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A collection of awesome .NET libraries, tools, frameworks and software

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Mar 28, 2025

Authentication and Authorization

• ASP.NET Core Identity (⭐36k) - New membership system for ASP.NET applications

Compilers, Transpilers and Languages

• FSharp (⭐4k) - The F# compiler and tools

• Iron python (⭐2.6k) - A python 3 implementation that is integrated with the dot net framework.

Database Drivers

• ServiceStack Redis (⭐5.4k) - .NET's leading C# Redis client

• StackExchange Redis (⭐5.4k) - General purpose Redis client from StackExchange

E-Commerce and Payments

• ServiceStack.Stripe (⭐5.4k) - Typed .NET clients for stripe.com REST APIs

Environment Management

• Dotnet CLI (⭐2.8k) - The cross-platform .NET Core command-line toolchain utility.

Game

• Friflo.Engine.ECS (⭐274) - High-performance C# ECS with simple API. Supports .NET, WASM/WebAssembly, Native AOT, Unity, Godot, MonoGame, ...

Git Tools

• Git Credential Manager (⭐7.4k) - Helps solving issues of credentials

Graphics

• Helix Toolkit (⭐2k) - Helix Toolkit is a collection of 3D components for .NET

• Silk.NET (⭐4.4k) - A cross-platform, high-performance, low-level .NET Standard wrapper for many advanced APIs such as OpenGL, OpenCL, OpenAL, OpenXR, Assimp, GLFW, as well as many others. In addition to wrapping over Native APIs, it also comes with its own Windowing and Input abstraction. This makes game and application development with Silk.NET a breeze, and has pretty much everything a 3D application developer would need.

GUI

• .NET MAUI (⭐23k) - Build native UIs for iOS, Android, Windows, and macOS from a single, shared C# codebase.

Install tools

• Wix Toolset (⭐677) - The most powerful set of tools available to create your Windows installation experience

MVVM

• Catel (⭐883) - Catel is an application development platform with the focus on MVVM (WPF, Silverlight, Windows Phone and WinRT) and MVC (ASP.NET MVC). The core of Catel contains an IoC container, models, validation, memento, message mediator, argument checking, etc.

Office

• EPPlus (⭐1.9k) - EPPlus is a .NET library that reads and writes Excel 2007/2010 files using the Open Office XML format (xlsx). [Source Available] [Free Tier]

ORM

• Dapper (⭐18k) - A simple object mapper for .NET by StackExchange

• ServiceStack.OrmLite (⭐5.4k) - Light, simple and fast convention-based POCO ORM [Free for OSS (⭐5.4k)] [$]

PDF

• IText (⭐1.8k) - iText is a PDF library that allows you to CREATE, ADAPT, INSPECT and MAINTAIN documents in the Portable Document Format (PDF)[$] [Free for OSS]

Serialization

• [ServiceStack.Text]https://github.com/ServiceStack/ServiceStack/tree/main/ServiceStack.Text (⭐5.4k)) - JSON, JSV and CSV Text Serializers used in servicestack.net

Testing

• Moq (⭐6.1k) - The most popular and friendly mocking framework for .NET

Web Frameworks

• ASP.NET [Core] - ASP.NET is a free web framework for building great web sites and applications

Jan 31, 2025

Artificial Intelligence

• LlmTornado (⭐98) - One .NET library to consume OpenAI, Anthropic, Cohere, Google, Azure, Groq, and self-hosed APIs.

Desktop

• Sucrose Wallpaper Engine (⭐657) - Sucrose is a versatile wallpaper engine that brings life to your desktop with a wide range of interactive wallpapers.

Logging

• AutoLoggerMessage (⭐80) - A source generator that automatically migrates all logging calls to high-performant LoggerMessage version.

Tools

• STranslate (⭐3.2k) - STranslate is a ready-to-go translation ocr tool developed with WPF.

Jan 22, 2025

API

• Population.NET (⭐36) - A .NET library allows clients to specify the exact fields they need, reducing unnecessary data transfer by avoiding the retrieval of all fields by default.

Tools

• FastCloner (⭐45) - Fast deep cloning library for .NET 8+. Zero-config, works out of the box.

Nov 26, 2024

Configuration

• AgileConfig (⭐1.6k) - AgileConfig is a lightweight configuration center that helps you manage all your application's configurations through website.

Web Servers

• GenHTTP (⭐222) - A lightweight, embeddable web server for quickly creating REST APIs

Sep 30, 2024

Algorithms and Data structures

• OneOf (⭐3.7k) - OneOf provides discriminated unions for C# with exhaustive compile time matching.

Compilers, Transpilers and Languages

• dotnet-repl (⭐763) - C# REPL (read-eval-print loop)

ORM

• DapperQueryBuilder (⭐527) - Dapper Query Builder using String Interpolation and Fluent API

Query Builders

• InterpolatedSql (⭐240) - SQL Builder using String Interpolation and Fluent API

Source Generator

• CodegenCS (⭐281) - Code Generation Toolkit where templates are written using plain C#. Command-line tool, MSBuild task, Visual Studio Extension, and Roslyn Source Generator.

Sep 28, 2024

CMS

• fluent-cms (⭐177) - RESTful CRUD (Create, Read, Update, Delete) APIs, Admin Panel web pages,a GraphQL-style query designer and a WYSIWYG web page designer, all fully configurable without writing code.

Web Frameworks

• Coalesce (⭐70) - Coalesce is a framework for rapid-development of ASP.NET Core web applications.

Source Generator

• List of Automated Testing Tools and Frameworks for .NET (⭐565) - List of Automated Testing (TDD/BDD/ATDD/SBE) Tools and Frameworks for .NET

Aug 16, 2024

CMS

• FluentCMS (⭐386) - FluentCMS is open source AI Driven ASP.NET Core Blazor Content Management System (CMS)

Web Frameworks

• CodeBehind Framework (⭐69) - Modern and powerful back-end framework under ASP.NET Core.

Jul 29, 2024

Authentication and Authorization

• Enforcer - Write fine grained authorization policy in easy-to-read language, and have it compiled to native .NET code [$]

• SAML IdentityServer - Add SAML 2P support to your Duende IdentityServer [$]

• SAML OpenIddict - Add SAML 2P support to your OpenIddict [$]

Caching

• BitFaster.Caching (⭐524) - Thread-safe in-memory caches optimized for very high concurrent throughput, near optimal hit rate and low latency.

Decompilation

• dnSpyEx (⭐8k) - Unofficial revival of dnSpy

Feature management

• Microsoft.FeatureManagement (⭐1.1k) - This library provides a way to develop and expose application functionality based on feature flags. It enables scenarios like new feature rollouts and A/B testing for experimentation purposes. It also provides integration with common .NET coding patterns and ASP.NET Core.

ORM

• Friflo.Json.Fliox (⭐168) - High performane ORM for Sqlite, MySql, SqlServer, PostgreSQL & NoSQL. Provides server with REST, GraphQL & WebSocket / PubSub API.

Queue

• AsyncMonolith (⭐66) - Facilitates simple asynchronous messaging in dotnet apps.

Web Browsers

• SharpBrowser (⭐930) - A full featured .NET web-browser built using C# and CefSharp

Jul 07, 2024

Authentication and Authorization

• Abblix OIDC Server (⭐51) - A fully certified OpenID Connect server library for .NET by the OpenID Foundation, providing comprehensive support for OAuth2 and OpenID Connect across all profiles. [$][Free for non-commercial use]

Blazor

• MudBlazor (⭐8.8k) - A Material Design framework for Blazor, allowing .NET developers to quickly build web apps, with extensive documentation and examples.

Database Drivers

• DuckDB.NET (⭐513) - .NET data provider for DuckDB

May 07, 2024

Queue

• Cap.Outbox (⭐10) - Implementation of the Outbox pattern and OnceExecutor service that guarantees idempotence: the operation will be performed once

Apr 09, 2024

Image Processing

• Unicolour (⭐77) - Colour conversion, interpolation, and comparison for .NET.

MQTT

• HiveMQtt (⭐68) - The HiveMQ C# MQTT client for .NET

• MQTTNet (⭐4.6k) - A high performance .NET library for MQTT based communication. It provides a MQTT client and a MQTT server (broker).

Source Generator

• extra-awesome-dotnet (⭐34) - Sorted lists of awesome .NET repositories, with counts of stars, issues, and forks!

Mar 25, 2024

E-Commerce and Payments

• SmartStoreNET (⭐1.3k) - Free ASP.NET Core MVC e-commerce Shopping Cart Solution

Mar 20, 2024

Artificial Intelligence

• LLamaSharp (⭐3.1k) - C#/.NET Binding of llama.cpp, run LLaMA/GPT model using C# without having to compile lama.cpp.

Compilers, Transpilers and Languages

• IKVM - A Java Virtual Machine and Bytecode-to-IL Converter for .NET. Execute compiled Java code (bytecode) on .NET Framework or .NET Core.

• Lib.Harmony (⭐5.6k) - Rewrite mono and C# methods at the runtime, Either write a method that will be executed, or edit the code of the method in IL, mainly used for game modding.

Tools

• OctaneEngine (⭐243) - A high performance multipart downloader with many features such as pause/resume support, asynchronous progress, and throttling.

WPF

• DeftSharp.Windows.Input (⭐99) - A simple keyboard/mouse event handler for Windows UI applications (WPF, MAUI, Avalonia)

Parser Library

• Parakeet (⭐75) - A recursive descent parsing library with operator overloading for C#.

Feb 23, 2024

API

• FastEndpoints (⭐5.1k) - High-performance middleground between classic ASP.NET Core API controllers and Minimal APIs. Using a REPR (Request-Endpoint-Response) pattern, this library eliminates the boilerplate and monolithic feel of controllers by improving colocation of code.

PDF

• QPdfSharp (⭐18) - A C# wrapper written around QPdf to allow for easy PDF manipulation that is tested for both linux and windows. QPdf is one of the only libraries capable of PDF linearization, and this wrapper ensures you keep up to date with the underlying improvements.

Feb 15, 2024

Visual Studio Plugins

• EFCore.Visualizer - View Entity Framework Core query plan directly in Visual Studio.

Feb 12, 2024

CMS

• Piranha CMS (⭐2.1k) - Piranha is the fun, fast and lightweight .NET framework for developing cms-based web applications with an extra bite. It's built on ASP.NET MVC and Web Pages and is fully compatible with both Visual Studio and WebMatrix. https://piranhacms.org

Code Snippets

• Entity Framework Playground - Examine the generated SQL for migrations and queries by writing DbContext and queries using it in the browser. Learn by example, compare different versions of Entity Framework and providers such as MS SQL, PostgreSql and Sqlite.

Game

• Foster (⭐513) - Foster is a small cross-platform 2D game framework in C#.

Feb 08, 2024

Office

• OfficeIMO (⭐302) - OfficeIMO makes it easier for developers to create/modify Word (docx) files without having Microsoft Word or Office installed

Web Servers

• SimpleW (⭐26) - Simple Web Server, build your RestAPI, fast, lightweight and cross-platform.

Jan 06, 2024

Office

• Syncfusion .NET Word Framework - A high-performance .NET Word framework without Microsoft Office or interop dependencies. Create, read, and edit Word documents seamlessly. Utilize advanced editor components for easy viewing, editing, and printing. Effortlessly convert Word documents to PDF, HTML, RTF, ODT, and EPUB formats with powerful conversion APIs. [$] [Free for Individuals and Small Businesses]

• Syncfusion .NET Excel Framework - A high-performance .NET Excel framework without Microsoft Office or interop dependencies. Create, read, and edit Excel documents seamlessly. Utilize Spreadsheet controls for creating, editing, and viewing easily. Effortlessly convert Excel files to PDF, images, and more with powerful conversion APIs. [$] [Free for Individuals and Small Businesses]

• Syncfusion .NET PowerPoint Framework - A high-performance .NET PowerPoint framework without Microsoft Office or interop dependencies. Create, read, and edit PowerPoint files seamlessly. Effortlessly convert PowerPoint files to PDFs and images with powerful conversion APIs. [$] [Free for Individuals and Small Businesses]

PDF

• Syncfusion .NET PDF Framework - A high-performance .NET PDF framework with no Adobe dependencies. Create, read, and edit PDF files seamlessly. Utilize PDF viewer controls for easy viewing, reviewing, and printing. Effortlessly convert HTML, Word, Excel, PowerPoint files, and images to PDF with powerful conversion APIs. [$] [Free for Individuals and Small Businesses]

Jan 04, 2024

HTTP

• Fluxzy.Core (⭐160) - A fully managed and fully streamed Man-On-The-Middle library to intercept, record and alter HTTP/1.1, H2, websocket traffic over plain or secure channels.

Nov 30, 2023

Authentication and Authorization

• Topaz - A fine-grained authorization system with .NET SDK.

Build Automation

• ModularPipelines (⭐351) - Write your pipelines in C#

Misc

• dotnet-exec (⭐70) - A command-line tool for executing C# program without a project file, and you can have your custom entry point other than Main method.

Oct 26, 2023

Game

• DotRecast (⭐647) - A port of Recast & Detour, navigation mesh toolset for games, Unity3D, servers, C#

Oct 23, 2023

ORM

• EntityFrameworkCore.SqlServer.SimpleBulks (⭐167) - Simple library that can help to sync a large number of records in-memory into the database. Lambda Expression is supported.

PDF

• IronPDF - High-performance C# PDF library with compatibility for various .NET versions, HTML to PDF conversion, content page conversion, file format support (e.g., DOCX, RTF, MD), responsive layouts, and robust PDF capabilities features ranging from compability, generating PDFs, formatting PDFs, and editing PDFs. [$] [Free trial available]

Aug 15, 2023

Mail

• MailKitSimplified (⭐87) - A fully-featured fluent wrapper for MailKit that makes sending and receiving emails as simple as possible.

Aug 03, 2023

Caching

• FastCache (⭐156) - 10X faster alternative to MemoryCache for .NET

Jul 25, 2023

Authentication and Authorization

• openiddict (⭐4.7k) - Flexible and versatile OAuth 2.0/OpenID Connect stack for .NET

Jul 15, 2023

Object to object mapping

• Mapperly (⭐3.2k) - A .NET source generator for generating object mappings. No runtime reflection.

May 29, 2023

Cloud Storage

• Cloud Storage (⭐76):- This library provides a universal interface for accessing and manipulating data in different cloud blob storage providers (Azure Storage, AWS S3, Google Cloud Storage. It makes it easy to switch between providers or to use multiple providers simultaneously, without having to learn and use multiple APIs.

May 26, 2023

Event aggregator and messenger

• EventFlow (⭐2.4k) - EventFlow is an Async/await first CQRS and Event Sourcing DDD framework for .NET

Graphics

• VectSharp (⭐277) - .NET library to create vector graphics and text, and then export it to PDF, SVG and raster image formats.

Image Processing

• ImageWizard (⭐72) - Image processing webservice based on ASP.NET Core and ImageSharp / SkiaSharp / SvgNet / DocNET

• SimpleITK - A simplified path to Insight. Open-source multi-dimensional image analysis in Python, R, Java, C#, Lua, Ruby, TCL and C++. Developed by the Insight Toolkit community for the biomedical sciences and beyond.

ORM

• EFCore.BulkExtensions (⭐3.8k) - Entity Framework Core Bulk Extensions for super fast (BulkCopy) CRUD ops + SaveChanges on multiple DBs: SQL, PG, My, Lite.

Tools

• Another Redis Desktop Manager (⭐32k) - A faster, better and more stable redis desktop manager [GUI client], compatible with Linux, Windows, Mac. What's more, it won't crash when loading massive keys.

Source Generator

• dotnet-console-games (⭐896) - Game examples implemented in .NET console applications.

Apr 11, 2023

IoC

• Microsoft.Extensions.DependencyInjection (⭐16k) - The default IoC container for NET applications.

Mar 03, 2023

Visual Studio Plugins

• SonarSource.sonarlint-visualstudio (⭐474) - SonarLint is a free, open source Visual Studio 2017, 2019 and 2022 extension that provides on-the-fly feedback to developers on new bugs and quality issues in C#, VB.NET, C/C++, TypeScript and JavaScript.

Source Generator

• M31.FluentAPI (⭐110) - Effortlessly generate fluent APIs for your C# classes.

Feb 19, 2023

Code Analysis and Metrics

• PVS-Studio - PVS-Studio is a static analyzer on guard of code quality, security (SAST), and code safety. [Free for OSS] [$]

Feb 16, 2023

Serialization

• FluentSerializer (⭐20) - A profile-based Serializer for multiple data-formats.

Feb 15, 2023

Blazor

• blazork8s (⭐188) - k8s management ui in blazor and .NET Core.

Code Analysis and Metrics

• Bencher - Suite of continuous benchmarking tools designed to catch performance regressions in CI.

Source Generator

• ASP.NET Core Developer Roadmap - A complete guide to become a ASP.NET Developer.

Feb 07, 2023

Cloud Storage

• FluentStorage (⭐327) - A polycloud .NET cloud storage abstraction layer originally known as Storage.Net. Provides a generic interface for Blob storage (AWS S3, GCP, FTP, SFTP, Azure Blob/File/Event Hub/Data Lake) and Messaging (AWS SQS, Azure Queue/ServiceBus).

Feb 04, 2023

HTTP

• Apizr (⭐155) Refit based web api client, but resilient (retry, connectivity, cache, auth, log, priority, etc...).

Jan 10, 2023

Testing

• SecTester (⭐2) - SecTester is a new tool that integrates Bright enterprise-grade scan engine directly into your integration or e2e tests. [Proprietary] [Free]

Jan 04, 2023

GraphQL

• ZeroQL (⭐294) - high-performance C#-friendly GraphQL client. It supports Linq-like syntax. It doesn't require Reflection.Emit or expressions. As a result, the runtime provides performance very close to a raw HTTP call.

Dec 22, 2022

IDE

• • CSharp Analyzer by MongoDB (⭐28) A free Visual Studio Extension for MongoDB users, helping translate your code into MongoDB queries

Dec 19, 2022

IDE

• vvvv A visual live-programming environment for .NET [Free for OSS]

Dec 15, 2022

Testing

• Testcontainers (⭐4k) - A library to support tests with throwaway instances of Docker containers for all compatible .NET Standard versions.

Dec 11, 2022

Mathematics

• Jodo.Numerics (⭐13) - Provides extra number types (such as fixed-point and non-overflowing numbers) with full support for operators, math, string-parsing etc. Extensively tested, and cross-platform compatible.

Oct 28, 2022

Database

• RocksDB (⭐175) - C# binding for Facebook's RocksDB Key-Value store + native builds for Windows, macOS and Linux

Oct 27, 2022

Emulators

• Blzhawk (⭐2.3k) - BizHawk is a multi-system emulator written in C#. BizHawk provides nice features for casual gamers such as full screen, and joypad support in addition to full rerecording and debugging tools for all system cores.

Image Processing

• MagicScaler (⭐669) - High-performance image processing pipeline for .NET, focused on making complex imaging tasks simple.

Oct 19, 2022

Template Engine

• Handlebars.Net (⭐1.3k) - A real .NET Handlebars engine

Oct 18, 2022

Template Engine

• SmartFormat (⭐1.2k) - A lightweight text templating library written in C# which can be a drop-in replacement for string.Format

Oct 17, 2022

Template Engine

• Fluid (⭐1.5k) - Fluid is an open-source .NET template engine based on the Liquid template language.

Sep 18, 2022

Misc

• SystemTextJson.JsonDiffPatch (⭐113) - High-performance, low-allocating JSON object diff and patch extension for System.Text.Json. Support generating patch document in RFC 6902 JSON Patch format.

Aug 26, 2022

Template Engine

• Morestachio (⭐52) - A full sized {{mustache}} like template engine with focus on extendibility.

Aug 24, 2022

Database

• ZoneTree (⭐409) - Persistent, high-performance, transactional, and ACID-compliant ordered key-value database for .NET.

Aug 16, 2022

GraphQL

• GraphQL.NET (⭐5.9k) - Implementation of Facebook's GraphQL (⭐14k) in .Net

• HotChocolate (⭐5.4k) - GraphQL server compatible to all GraphQL compliant clients like Strawberry Shake, Relay, Apollo Client, and various other clients and tools.

• EntityGraphQL (⭐434) - library to build a GraphQL API on top of data model with the extensibility to easily bring multiple data sources together in the single GraphQL schema (EF is not a requirement - any ORM working with LinqProvider or an in-memory object will work).

Jul 31, 2022

Code Analysis and Metrics

• WebBen (⭐11) - Is a tool for benchmarking your Hypertext Transfer Protocol (HTTP) server.

Jul 27, 2022

Queue

• SlimMessageBus (⭐502) - Lightweight message bus with transports for popular messaging systems (Kafka, Redis, Azure Service Bus, and others) and in-memory communication.

Jul 19, 2022

Algorithms and Data structures

• Akade.IndexedSet (⭐67) - A convenient data structure supporting efficient in-memory indexing and querying, including range queries and fuzzy string matching.

Jun 22, 2022

RPC

• gRPC UI (⭐5.5k) - gRPC UI is a command-line tool that lets you interact with gRPC servers via a browser. It's sort of like Postman, but for gRPC APIs instead of REST.

Jun 21, 2022

RPC

• gRPCurl (⭐11k) - gRPCurl is a command-line tool that lets you interact with gRPC servers. It's basically curl for gRPC servers.

Serialization

• F# Data - F# type providers for accessing XML, JSON, CSV and HTML files (based on sample documents) and for accessing WorldBank data

Jun 18, 2022

RPC

• gRPC (⭐4.3k) An RPC library and framework for .NET Core. Read more about it on Docs Microsoft

Jun 12, 2022

API

• WTelegramClient (⭐1.1k) - Automate a user account on Telegram, using the latest version of Telegram Client API

Jun 06, 2022

Blazor

• Megabit.Blazorise (⭐3.4k) - Blazorise is a component library built on top of Blazor and CSS frameworks like Bootstrap, Bulma and Material. Very easy to use.

Jun 01, 2022

Cryptography

• Paseto.Core (⭐112) - A Paseto (Platform-Agnostic Security Tokens) implementation for .NET

May 29, 2022

Source Generator

• Supernova.Enum.Generators (⭐188) - A C# source generator to create an enumeration class from an enum type. With this package, you can work on enums very, very fast without using reflection.

May 25, 2022

PDF

• Kevsoft.PDFtk (⭐37) - A wrapper to drive the awesome pdftk binary, which can fill PDF forms, get field information, concatenate multiple documents or pages, split documents, add or replace stamps, and can attach files to or download files from pages.

May 24, 2022

Scheduling

• NCrontab.Scheduler (⭐15) - Simple task scheduler library for scheduling NCrontab-based tasks

Feb 22, 2022

Cryptography

• CryptoNet (⭐104) - .NET simple crypto library. Native c#.

Image Processing

• PixelViewer (⭐299) - Cross-platform (Windows/macOS/Linux) image viewer which supports reading raw Luminance/YUV/RGB/ARGB/Bayer pixels data from file and rendering it. 10/16-bit YUV and viewing image frame sequence are also supported (v1.99+).

Feb 20, 2022

Machine Learning and Data Science

• F# Data (⭐833) - F# type providers for accessing XML, JSON, CSV and HTML files (based on sample documents) and for accessing WorldBank data

Feb 08, 2022

CMS

• Squidex (⭐2.4k) - Open source headless CMS and content management hub. https://squidex.io

Tools

• UnitsNet (⭐2.8k) - Makes life working with units of measurement just a little bit better.

Jan 06, 2022

Cloud Storage

• Stowage (⭐175) - Bloat-free zero dependency .NET cloud storage kit that supports at minimum THE major cloud providers.

Dec 29, 2021

Git Tools

• Husky.Net (⭐737) - Git hooks made easy with Husky.Net internal task runner, You can use it to lint your commit messages, run tests, lint code, etc... when you commit or push. supports C# scripts, gitflow hooks, Multiple file states (staged, lastCommit, glob)

Dec 27, 2021

Tools

• CSharpier (⭐1.6k) - An opinionated code formatter for c# that is based on the Prettier (⭐50k) printing process.

Dec 21, 2021

Logging

• ULogViewer (⭐452) - Cross-Platform (Windows/macOS/Linux) Universal Log Viewer which supports reading and parsing various type of logs. You can also define your own profile to parse and show logs.

Dec 17, 2021

Blazor

• MASA.Blazor (⭐1.2k) - A set of enterprise-class UI components based on Material Design and Blazor WebAssembly.

Dec 04, 2021

Application Frameworks

• Signals (⭐64) - Signals is a .NET5 based framework which focuses on increasing the quality and productivity within development teams by providing them with tools, aspects and processes.

Serialization

• FlatSharp (⭐525) - Fast, idiomatic FlatBuffers implementation. Use .fbs files or attributes.

Nov 30, 2021

GUI

• UNO Platform - The only platform for building native mobile, desktop and WebAssembly with C#, XAML from a single codebase. Open source and professionally supported. Website: platform.uno

MVVM

• Community Toolkit - Collection of control & helper libraries and samples for various .NET technologies. Contains modern MVVM library, supported by Microsoft. Includes Windows Community Toolkit (⭐6k), MAUI Community Toolkit (⭐2.4k), and Dotnet Community Toolkit (⭐3.2k).

Oct 25, 2021

Serialization

• ObjectDumper.NET (⭐409) - Serializes in-memory object to C# code.

Oct 24, 2021

Mathematics

• WPF-Math (⭐668) - a .NET library for rendering mathematical formulae using the LaTeX typesetting style, for the WPF framework

Office

• Toxy (⭐369) - .NET text extraction framework supports a few file formats

ORM

• SqlSugar (⭐5.5k) - Another ORM library supports many RDBMS including MySql, SqlServer, Sqlite, Oracle, Postgresql

Oct 23, 2021

JavaScript Engines

• YantraJS (⭐243) - JavaScript Runtime (Similar to NodeJS) for .NET Standard, compiles JavaScript to IL, support for many ES6 features, generators, CommonJS modules, CSX modules and expression compiler.

Misc

• Build Versioning (⭐61) - Simple build versioning for .NET, powered by Git tags

Oct 22, 2021

Testing

• NBomber (⭐2.1k) - Very simple load testing framework for Pull and Push scenarios. It's 100% written in F# and targeting .NET Core and full .NET Framework.

Oct 12, 2021

Game

• osu!framework (⭐1.7k) - A 2D application/game written with amazing games in mind.

Sep 28, 2021

Application Frameworks

• Plastic (⭐61) - Plastic provides encapsulation of things like Domain, Application Rules, Business Rules or Business Logic in Application. For this, Command pattern is used.

Calendar

• Stream (⭐66) Official .NET API client for Stream Chat, a service for building chat applications.

Graphics

• ScottPlot - A plotting library to interactively displays large datasets. Line plots, bar charts, pie graphs, scatter plots, and more. It supports WinForms, WPF, Avalonia, Console.

Sep 21, 2021

Graphics

• LiveCharts2 (⭐4.6k) - Simple, flexible, interactive & powerful charts, maps, and gauges for .Net. LiveCharts2 supports WPF, WinForms, Xamarin, Avalonia, WinUI, UWP.

Aug 19, 2021

Game

• FNA (⭐2.7k) - FNA is an XNA4 reimplementation that focuses solely on developing a fully accurate XNA4 runtime for the desktop

Aug 17, 2021

Cryptography

• NaCl.Core (⭐76) - A managed-only cryptography library for .NET which provides modern cryptographic primitives.

Aug 13, 2021

Functional programming

• MoreLinq (⭐3.7k) - Provides extra methods to LINQ to Objects.

Misc

• RecordParser (⭐299) - Library to help reading and writing CSV and Flat files with zero heap allocation.

Aug 01, 2021

API

• CommandQuery (⭐108) - Command Query Separation for 🌐ASP.NET Core ⚡AWS Lambda ⚡Azure Functions ⚡Google Cloud Functions 🌐ASP.NET Web API 2

Application Frameworks

• silky (⭐279) - The Silky framework is designed to help developers quickly build a microservice development framework through simple code and configuration under the .net platform.

Blazor

• ant-design-blazor (⭐6k) - A set of enterprise-class UI components based on Ant Design and Blazor WebAssembly.

Distributed Computing

• .NEXT Raft (⭐1.7k) - Raft implementation for .NET and ASP.NET Core that allows to build clustered microservices powered by distributed consensus and replication

E-Commerce and Payments

• Adyen (⭐112) - The official Adyen Payment API Library for .NET

Graphics

• Aspose.Drawing - Fully managed, cross-platform, complete 2D graphic library for drawing text, geometries, and images, with System.Drawing compatible API. [$]

Interactive programming

• .NET Interactive (⭐3k) - .NET Interactive takes the power of .NET and embeds it into your interactive experiences.

Mathematics

• AngouriMath (⭐796) - An open-source symbolic/computer algebra library, made primarily for C# and F#. It covers a range of features and might be considered as an alternative to SymPy in .NET.

Misc

• LINQPad.QueryPlanVisualizer (⭐408) - View SQL Server and Postgres query plans directly inside LINQPad.

Networking

• SharpPcap (⭐1.4k) - Fully managed, cross platform (Windows, Mac, Linux) .NET library for capturing packets from live and file based devices.

Office

• ShapeCrawler (⭐339) - A fluent API for the processing of PowerPoint presentations without Microsoft Office installed.

• MiniExcel (⭐2.9k) - A micro Excel helper avoids OOM and high performance to create/mapping/template-fill-data.

ORM

• FreeSql (⭐4.2k) - a convenient ORM in dotnet, supports MySql, SqlServer, PostgreSQL, Oracle, Sqlite, Firebird, 达梦, 人大金仓, 神舟通用, 翰高 and Access.

PDF

• PdfPig - Read and create and extract text and other content from PDFs in C# (port of PdfBox)

• QuestPDF - QuestPDF is a modern and battle-tested library that can help you with generating PDF documents by offering friendly, discoverable and predictable C# fluent API. [Source Available] [Free for OSS]

Protocols

• Tecan SiLA2 SDK - A library and code generator to develop SiLA2 clients and servers.

Queue

• Silverback - A simple but feature-rich message bus for .NET core (supports Kafka, RabbitMQ and MQTT).

Testing

• BDTest (⭐84) - A behaviour driven testing and reporting framework!

• CsCheck (⭐175) - Random testing library for C#. Including concurrency, causal profiling, regression and performance testing.

Tools

• JSON Formatter and Validator - A blazing fast JSON formatter and validator that won't share JSON with a server.

Visual Studio Plugins

• Tabs Studio - Visual Studio tab manager with multiple tab rows, tab coloring and tab grouping. [$]

• Roslynator (⭐3.2k) - A collection of 500+ analyzers, refactorings and fixes for C#, powered by Roslyn

Jun 26, 2021

Application Frameworks

• Fusion (⭐1.9k) - .NET Core and Blazor library that attempts to dramatically improve the way we implement real-time and high-load services by introducing a novel kind of "computed observables" - immutable, thread-safe, and most importantly, almost invisible for developers. Samples 1 (⭐163) Samples 2 (⭐71)

Caching

• FusionCache (⭐2.7k) - An easy to use, high performance and robust cache with an optional distributed 2nd layer and some advanced features, like a fail-safe mechanism and advanced timeouts management

E-Commerce and Payments

• GrandNode (⭐1.2k) - Headless, multi-vendor, multi-tenant, the most advanced open source e-commerce platform based on .NET Core 5.0 and MongoDB.

Mar 03, 2021

Blazor

• BootstrapBlazor (⭐3.3k) - A set of enterprise-class UI components based on Bootstrap and Blazor.

Misc

• Validot (⭐325) - Validot is a performance-first, compact library for advanced model validation. Using a simple declarative fluent interface, it efficiently handles classes, structs, nested members, collections, nullables, plus any relation or combination of them. It also supports translations, custom logic extensions with tests, and DI containers.

Source Generator

• Awesome Microservices .NET Core (⭐2.9k) - A collection of awesome training series, articles, videos, books, courses, sample projects, and tools for Microservices in .NET Core.

Jan 22, 2021

HTTP

• WebApiClient (⭐2.1k) An open source project based on the HttpClient. You only need to define the c# interface and modify the related features to invoke the client library of the remote http interface asynchronously.

Jan 15, 2021

CLR

• Runtime (⭐16k) - Mono and CoreCLR .NET runtimes, as well as the standard library and some higher level components like System.Linq and System.Text.Json.

Caching

• Cache Tower (⭐619) - An efficient multi-layered caching system for .NET (In-Memory, Redis, Database, File etc)

CLI

• CommandDotNet (⭐594) - Model your console app using C# in a composable manner. Define commands with methods. Define subcommands with properties or nested classes. Extensible parsing and command execution.

• CommandLineUtils (⭐2.2k) - This is a fork of Microsoft.Extensions.CommandLineUtils, which is no longer under active development.

DirectX

• Vortice.Windows (⭐1.1k) - Cross platform .NET standard libraries for DirectX, WIC, Direct2D1, XInput, XAudio and X3DAudio

Logging

• Rollbar.NET (⭐65) - Simplifies real-time remote error monitoring while using Rollbar.com. Open-source Rollbar Notifier SDK for any .NET-based technology stack. The SDK that can be used in any application built on the following .NET versions: .NET Core 2.0+, .NET Standard 2.0+, .NET Full Framework 4.5.1+, Mono, Xamarin, and, in general, any implementation of the .NET Standard 2.0+. It simplifies building data payloads based on exception data, tracing data, informational messages, and telemetry data and sends the payloads to the Rollbar API for remote monitoring and analysis of the hosting application's behavior. [Connects to Proprietary Service] [Free Tier]

• ZeroLog (⭐415) - ZeroLog is a zero-allocation .NET logging library. It provides basic logging capabilities to be used in latency-sensitive applications, where garbage collections are undesirable.

Machine Learning and Data Science

• SciSharp STACK - A rich machine learning ecosystem for .NET created by porting the most popular Python libraries to C#.

Networking

• NetCoreServer (⭐2.9k) - Ultra fast and low latency asynchronous socket server & client C# .NET Core library with support TCP, SSL, UDP, HTTP, HTTPS, WebSocket protocols and 10K connections problem solution (NETStandard).

Object to object mapping

• Mapster (⭐4.5k) - A high performance object mapper in .net

ORM

• MongoFramework (⭐393) - An "Entity Framework"-like interface for MongoDB

Serialization

• CsvExport (⭐172) - Very simple & lightweight CSV exporter, Excel friendly, escapes text & quotes etc.

Strong Naming

• .NET Assembly Strong-Name Signer (⭐335) - Utility software to strong-name sign .NET assemblies, including assemblies you do not have the source code for.

Testing

• Compare-Net-Objects (⭐1.1k) - Perform a deep compare of any two .NET objects using reflection. Shows the differences between the two objects.

Nov 30, 2020

Algorithms and Data structures

• Towel (⭐739) - data structures, algorithms, mathematics, metadata, extensions, console, measurements, and other useful stuff

GUI

• Ookii.Dialogs.Wpf (⭐1.2k) - Enable WPF applications to access common Windows dialogs such as task dialogs, credential dialog, progress dialog, folder browser dialog, and more

• Ookii.Dialogs.WinForms (⭐640) - Enable Windows Forms applications to access common Windows dialogs such as task dialogs, credential dialog, progress dialog, folder browser dialog, and more

Minification

• CompressedStaticFiles (⭐92) - Send compressed static files to the browser without having to compress on demand, also has support for sending more advanced image formats when the browser indicates that i has support for it.

Tools

• Downloader (⭐1.4k) - Fast and reliable multipart downloader with asynchronous progress events for .NET applications.

Oct 20, 2020

Caching

• EasyCaching (⭐2k) - A caching library that contains basic and some advanced usages of caching which can help handle caching more easier!

Tools

• YARP (⭐8.9k) - YARP is a reverse proxy toolkit for building fast proxy servers in .NET using the infrastructure from ASP.NET and .NET.

Oct 19, 2020

CLI

• spectre.console (⭐9.9k) - A library that makes it easier to create beautiful console applications.

Distributed Computing

• Orleankka (⭐497) - Orleankka is a functional API for Microsoft Orleans framework. It is highly suitable for scenarios where having composable, uniform communication interface is preferable, such as: CQRS, event-sourcing, re-routing, FSM, etc. Additional API available for F# called Orleankka.FSharp.

Testing

• ArchUnitNET (⭐1k) - Simple library for checking the architecture of C# code with a fluent API.

• Snapshooter (⭐315) - A snapshot testing tool for .NET Core and .NET Framework

Oct 02, 2020

GUI

• Bunifu UI Framework - Carefully crafted Winforms controls and components for creating stunning modern application UI. [$]

Sep 18, 2020

Build Automation

• MSBuild (⭐5.3k) - The Microsoft Build Engine (MSBuild) is the build platform for .NET and Visual Studio

Documentation

• Swashbuckle (⭐3.1k) - Seamlessly adds a Swagger to Web API projects.

Internationalization

• ResX Resource Manager (⭐1.4k) - The most popular free tool to localize all kind of applications with resx-based resources.

Interoperability

• pinvoke (⭐2.1k) - A library containing P/Invoke code for latest Windows OS.

ORM

• Fluent NHibernate (⭐1.7k) - Fluent, XML-less, compile safe, automated, convention-based mappings for NHibernate.

Package Management

• Cloudsmith - A fully managed package management SaaS, with support for NuGet, Npm, Docker and much more. [Free for Public/OSS] [$]

Reactive Programming

• Dynamic Data (⭐1.8k) - Reactive Extensions (Rx) for collections

Testing

• Verify (⭐3.2k) - Verification tool to enable simple approval of complex models and documents.

Tools

• Open Live Writer (⭐2.5k) - Blog writer which integrated with WordPress, Blogger, et. al. Open Live Writer makes it easy to write, preview, and post to your blog.

• Papercut (⭐3.1k) - Papercut is an open source (.NET based) test email viewer that runs locally with a built-in SMTP server designed to receive and notify of test email messages.

UI Automation

• FlaUI (⭐2.4k) - FlaUI is a .NET library which helps with automated UI testing of Windows applications (Win32, WinForms, WPF, Store Apps, ...).

Visual Studio Plugins

• VsVIM (⭐3.7k) - VIM in Visual Studio

Sep 15, 2020

Code Snippets

• Sharplab - Run C# code using different branches and versions of Roslyn, see the IL that was produced and examine the JIT's output.

Mathematics

• MKL.NET (⭐174) - A simple cross platform .NET API for Intel MKL.

PDF

• Docotic.Pdf - PDF library to create, read, edit, draw, and print PDF documents in .NET and .NET Core applications. 100% managed, without unsafe blocks. [$] [Free for OSS]

Sep 14, 2020

Template Engine

• Scriban (⭐3.4k) - A fast, powerful, safe and lightweight text templating language and engine for .NET

UI Automation

• PuppeteerSharp (⭐3.6k) - Puppeteer Sharp is a .NET port of the official Node.JS Puppeteer API.

• PuppeteerSharp.Contrib (⭐82) - Contributions to Puppeteer Sharp that provides a convenient way to write readable and robust browser tests.

Parser Library

• CSLY (⭐386) - A light embedded C# lexer/parser generator.

Jun 17, 2020

Application Templates

• JHipster.NET (⭐319) JHipster blueprint for replace orginal SpringBoot Backend by asp.net core. The main goal generator of jhipster is showcases best practices of modern web development in java. So the goal of the project is to do the same in .net. The Frontend can be generated with angular or react and soon with blazor.

GIS

• DEM Net Elevation API (⭐313) - .Net library for Digital Elevation Models, allows 3D terrain generation in glTF / STL format.

Real-time Communications

• SIPSorcery (⭐1.6k) - A cross platform C# .NET library supporting SIP, VoIP and WebRTC.

May 13, 2020

Calendar

• iCal.NET (⭐844) iCal.NET is an iCalendar (RFC 5545) class library for .NET aimed at providing RFC 5545 compliance, while providing full compatibility with popular calendaring applications and libraries.

PDF

• Cloudmersive PDF - Cloudmersive PDF is a native .NET Framework and .NET Core NuGet library and API service that can create, modify, encrypt or convert PDF documents at high scale and fidelity; and is free to use with no expiration [Free]

Apr 24, 2020

ORM

• EntityFramework.Exceptions (⭐1.6k) - Use typed Exceptions for Entity Framework Core when your SQL query violates database constraints in SqlServer, MySql, PostgreSQL or SQLite

Apr 21, 2020

PDF

• Pdfium.Net SDK - Advanced C# PDF library for render, create, edit, merge, split, print, and view PDFs. Open source PDF Viewer is available on GitHub. A NuGet package is also available for easy inclusion into your projects.[$]

Serialization

• Protobuf.NET (⭐4.8k) - Protocol buffers is the name of the binary serialization format used by Google for much of their data communications

Testing

• xUnit.net (⭐4.3k) - A free, open source, community-focused unit testing tool for the .NET Framework.

• ReportPortal - AI-powered Test Automation Dashboard. Acquire, aggregate and analyze test reports to ascertain release health.

Apr 20, 2020

Game

• Stride Game Engine - Stride Game Engine is a 2D/3D cross-platform game engine featuring a scene editor, particles, physically based rendering (PBR), scripting, and much more

Misc

• CSScript - CS-Script is a CLR based scripting system which uses C# as a programming language. CS-Script currently targets Microsoft implementation of CLR (.NET 2.0/3.0/3.5/4.0/4.5) with full support on Mono. Comes with many additional features, such as script hosting.

MVVM

• Toms Toolbox (⭐110) - Visual Composition framework to easily build modularized MVVM applications based on the Managed Extensibility Framework (MEF).

Protocols

• DnsClient.NET (⭐810) - A simple yet very powerful and high performant open source library for the .NET Framework to do DNS lookups.

Mar 04, 2020

WebSocket

• Websocket.Client (⭐720) - A multiplatform wrapper over native C# class ClientWebSocket with built-in reconnection and error handling.

Feb 26, 2020

Logging

• Logary (⭐526) - Logary is a high performance, multi-target logging, metric, tracing and health-check library for Mono and .NET. .NET's answer to DropWizard. Supports many targets, built for micro-services.

Mathematics

• ALGLIB - ALGLIB is a cross-platform numerical analysis and data processing library. It supports several programming languages (C++, C#, Delphi) and several operating systems (Windows and POSIX, including Linux) [Proprietary] and [Free Edition]

Misc

• FluentValidation (⭐9.3k) - A small validation library for .NET that uses a fluent interface and lambda expressions for building validation rules.

ORM

• Entity Framework Core (⭐14k) - Object-relational mapper that enables .NET developers to work with relational data using domain-specific objects

Feb 25, 2020

Authentication and Authorization

• ASP.NET SAML (⭐389) - SAML authentication support for ASP.NET apps

Feb 12, 2020

Database

• DBreeze (⭐549) - DBreeze Database is an open-source embedded Key-Value store

Feb 06, 2020

Build Automation

• FlubuCore (⭐911) - A cross platform build and deployment automation system for building projects and executing deployment scripts using C# code.

Compilers, Transpilers and Languages

• IronScheme (⭐386) - R6RS Scheme compiler, runtime and many standard libraries

Database

• Event Store (⭐5.5k) - The open-source, functional database with Complex Event Processing in JavaScript

Documentation

• SourceBrowser (⭐1.1k) - Source browser website generator that powers https://referencesource.microsoft.com

Extensions

• ExtensionMethods.Net - Site with collection of extension methods

Feb 05, 2020

CLI

• CliFx (⭐1.5k) - Declarative framework for building command line interfaces.

GUI

• Windows UI Library (⭐6.6k) - The Windows UI Library (WinUI) provides official native Microsoft UI controls and features for Windows UWP apps.

Mathematics

• MathNet - Math.NET is an open source initiative to build and maintain toolkits covering fundamental mathematics, targeting advanced but also every day needs of .NET developers

• GeometRi (⭐207) - Simple and lightweight computational geometry library for .Net

Misc

• NaturalSort.Extension (⭐188) - Extension method for StringComparer that adds support for natural sorting (e.g. "abc1", "abc2", "abc10" instead of "abc1", "abc10", "abc2").

Office

• GemBox.Bundle - A package of .NET components that enable fast, simple and efficient processing of office files (Excel, Word, PowerPoint, PDF and emails). [$]****[Free Lite versions]

• Outlook Redemption - Library to work with the Outlook Object Model and (Extended) MAPI. Supports Outlook 98 - 2019. Work with objects/mails/accounts/folders in Exchange and Outlook. [$]

ORM

• RepoDb (⭐1.8k) - A hybrid ORM library for .NET.

SDK and API Clients

• Dropbox.NET (⭐340) - Official .NET SDK for the Dropbox API

Style Guide

• C# Async Guidance (⭐8.4k) - list of problematic asynchronous patterns for .NET Core with an explanation of how to solve those issues

Source Generator

• NuGet Trends - Check out NuGet packages adoption and what's trending on NuGet.

Sep 29, 2019

Blockchain

• Nethermind (⭐1.4k) - full Ethereum client in .NET Core

GUI

• HandyControl (⭐6.4k) - Contains some simple and commonly used WPF controls

Image Processing

• Colourful (⭐286) - Open source .NET library for working with color spaces.

Install tools

• Onova (⭐539) - An unopinionated auto-update framework for desktop applications.

Machine Learning and Data Science

• Catalyst (⭐786) Cross-platform Natural Language Processing (NLP) library inspired by spaCy, with pre-trained models, out-of-the box support for training word and document embeddings, and flexible entity recognition models. Part of the SciSharp Stack

Mathematics

• Rationals (⭐84) - Implementation of rational number arithmetic for .NET with arbitrary precision.

Misc

• Coravel (⭐4.1k) Near-zero config .NET Core library that makes Task Scheduling, Caching, Queuing, Mailing, Event Broadcasting (and more) a breeze!

Tools

• Mockaco (⭐340) - API mock server with fast setup, useful to simulate HTTP responses, leveraging ASP.NET Core features, built-in fake data generation and C# scripting engine powered by Roslyn scripting API.

Source Generator

• .NET Open Source Developer Projects (⭐15k) - This community maintained list showcases .NET open source projects that are useful for any aspect of the development process.

Apr 28, 2019

HTTP

• Flurl - Fluent, portable, testable REST/HTTP client library

Mar 27, 2019

Testing

• NFluent - NFluent is an assertion library which aims to fluent your .NET TDD experience.

Mar 21, 2019

Package Management

• Sleet (⭐378) - A NuGet v3 static feed generator with support for AWS S3 and Azure Storage

Mar 18, 2019

E-Commerce and Payments

• NopCommerce (⭐9.5k) - nopCommerce. Free open-source e-commerce shopping cart (ASP.NET Core)

Mar 17, 2019

Scheduling

• Workflow Core (⭐5.5k) - Lightweight embeddable workflow engine

Mar 15, 2019

API

• Ocelot (⭐8.5k) - .NET core API Gateway

Mar 12, 2019

Interoperability

• Pyrolite (⭐182) - This library allows your Java or .NET program to interface very easily with the Python world. It uses the Pyro protocol to call methods on remote objects.

Mar 05, 2019

API

• ASP.NET Web API - Framework that makes it easy to build HTTP services that reach a broad range of clients, including browsers and mobile devices

• Breeze - API framework enabling rich data access by using the OData 3 protocol. Client libraries available for JavaScript and C#.

Compilers, Transpilers and Languages

• Hybridizer - CIL (C#, VB.Net, F#) to CUDA compiler. [$]

Continuous Integration

• TeamCity - Ready to work, extensible and developer-friendly build server — out of the box [$]

Database

• LiteDB (⭐8.8k) - A .NET NoSQL Document Store in a single data file - https://www.litedb.org

Decompilation

• ILSpy - ILSpy is the open-source .NET assembly browser and decompiler

Markdown Processors

• F# Formatting - Tools for documenting F# and C# projects. The library contains extensible Markdown parser as a core component.

GIS

• OsmSharp - C# library to work with OpenStreetMap (OSM) data. Provides reading, writing and route-planning for OSM data.

Git Tools

• GitExtensions (⭐7.9k) - GitExtensions is a shell extension, a Visual Studio 2008/2010/2012/2013 plugin and a standalone Git repository tool. https://gitextensions.github.io/

HTML and CSS

• LibSass Host (⭐86) - .NET wrapper around the libSass library with the ability to support a virtual file system

IDE

• Waf DotNetPad - A simple and fast code editor that makes fun program with C# or Visual Basic.

Object to object mapping

• AutoMapper (⭐10k) - A convention-based object-object mapper in .NET. https://automapper.org

Office

• NPOI (⭐99) - This project is the .NET version of POI Java project at https://poi.apache.org/.

Package Management

• Paket (⭐2k) - A package dependency manager for .NET with support for NuGet packages and GitHub repositories. https://fsprojects.github.io/Paket/

Search

• Lucene.net - Lucene.Net is a port of the Lucene search engine library, written in C# and targeted at .NET runtime users

Testing

• NSubstitute - A friendly substitute for .NET mocking frameworks

Visual Studio Plugins

• Resharper - Developer Productivity Tool for Visual Studio [$]

Feb 08, 2019

Tools

• NETworkManager (⭐7k) - A powerful tool for managing networks and troubleshoot network problems!

Jan 14, 2019

Algorithms and Data structures

• Algorithmia (⭐540) - Algorithm and data-structure library for .NET 3.5 and up. Algorithmia contains sophisticated algorithms and data-structures like graphs, priority queues, command, undo-redo and more.

Application Frameworks

• DotNetty (⭐4.1k) - DotNetty is a port of Netty, asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients.

Compilers, Transpilers and Languages

• Nemerle (⭐624) - Nemerle is a high-level statically-typed programming language for the .NET platform. It offers functional, object-oriented and imperative features. It has a simple C#-like syntax and a powerful meta-programming system.

Documentation

• DocNet (⭐252) - Your friendly static documentation generator, using markdown files to build the content.

Event aggregator and messenger

• MediatR (⭐11k) - Simple, unambitious mediator implementation in .NET

Logging

• Foundatio (⭐2k) - A fluent logging API that can be used to log messages throughout your application.

Misc

• Polly (⭐14k) - Express transient-exception-handling and resilience policies such as Retry, Wait-and-Retry, Circuit Breaker, and Bulkhead Isolation in a fluent manner. Fully thread-safe and full async support. (4.0 / 4.5 / .NET Core / .NET Standard / Xamarin).

Queue

• Confluent's .NET Client (⭐136) - Confluent's .NET Client for Apache Kafka.

• Brighter (⭐2.1k) - Command Dispatcher, Processor, and Distributed Task Queue https://www.goparamore.io/

Testing

• Canopy (⭐507) - Canopy is a free, open source F# web automation and testing framework

Jan 02, 2019

WPF

• WPF (⭐7.2k) - WPF is a .NET Core UI framework for building Windows desktop applications.

Dec 23, 2018

Application Templates

• Nucleus (⭐357) - Vue startup application template that uses ASP.NET Core API layered architecture at the back-end and JWT based authentication

Dec 10, 2018

Application Frameworks

• ABP (⭐13k) - The next generation of the ASP.NET Boilerplate web application framework.

GUI

• SciterSharp (⭐109) - Create .NET cross-platform desktop apps using not just HTML, but all features of Sciter engine: CSS3, SVG, scripting, AJAX, <video>... Sciter is free for commercial use

Trading

• StockSharp (⭐7.9k) - Trading and algorithmic trading open source platform (stock markets, forex, bitcoins and options). https://stocksharp.com

Visual Studio Plugins

• Productivity Power Tools - A set of extensions to Visual Studio Professional (and above) which improves developer productivity.

Dec 07, 2018

Graphics

• Veldrid (⭐2.5k) - A low-level, portable graphics and compute library for .NET

Nov 30, 2018

Testing

• Stryker.NET (⭐1.9k) - Mutation testing for .NET Core projects

Nov 20, 2018

Parser Library

• Pidgin (⭐979) - A lightweight, fast and flexible parsing library for C#, developed at Stack Overflow

• Superpower (⭐1.2k) - A C# parser construction toolkit with high-quality error reporting

Nov 10, 2018

IoC

• Stashbox (⭐144) - A lightweight, portable dependency injection framework for .NET based solutions.

Nov 06, 2018

Business Intelligence

• FastReport (⭐2.8k) - The open source report generator for .NET Core 2.x/.Net Framework 4.x. FastReport can be used in ASP.NET MVC, Web API applications.

Nov 05, 2018

IoC

• DryIoc (⭐1.1k) - Simple, fast all fully featured IoC container.

Oct 29, 2018

Graphics

• AssimpNet - A cross-platform .NET Standard wrapper for the Open Asset Importer ("Assimp"). The library enables importing, processing, and exporting of 3D models for rendering in graphics/game applications. Over 40 formats are supported for importing (e.g. OBJ, FBX, GLTF, 3DS, Collada) and a subset of those formats can be exported to (e.g. OBJ, GLTF, 3DS, Collada). Mesh processing features allow for mesh data to be generated or optimized for real-time rendering.

Oct 25, 2018

Machine Learning and Data Science

• Infer.NET - A framework for running Bayesian inference in graphical models. It can also be used for probabilistic programming.

Oct 23, 2018

Template Engine

• RazorLight (⭐1.6k) - Open source template engine based on Microsoft's Razor parsing engine supporting .NET Standard 2.0

Oct 12, 2018

IoC

• Lamar - A fast IoC container heavily optimized for usage within ASP.NET Core and other .NET server side applications.

Oct 08, 2018

Code Analysis and Metrics

• NDepend - is a Visual Studio and VS Team Services extension that estimates your .NET code quality and Technical-Debt, that lets create code rules with C# LINQ syntax, visualize code structure and focus on changes and evolution. [$]

Oct 05, 2018

Office

• NetOffice (⭐723) - .NET wrapper assemblies for Microsoft Office applications.

Oct 04, 2018

Logging

• Sentry (⭐652) - .NET SDK for Sentry Open-source error tracking that helps developers monitor and fix crashes in real time..

Oct 02, 2018

CMS

• DotNetNuke - DNN Platform is our free, open source web CMS and the foundation of every professional DNN solution. Over 750,000 organizations worldwide have built websites powered by the DNN Platform.

Package Management

• MyGet - Hosted Package Repository for NuGet, NPM, Bower and VSIX. Also provides CI as-a-Service. [$]

GUI

• UWP Community Toolkit (⭐6k) - The UWP Community Toolkit is a collection of helper functions, custom controls, and app services. It simplifies and demonstrates common developer tasks building UWP apps for Windows 10.

HTML and CSS

• HtmlAgilityPack - an agile HTML parser that builds a read/write DOM and supports plain XPath or XSLT

Source Generator

• Awesome Xamarin (⭐1.9k) - A collection of interesting libraries/tools for Xamarin mobile projects.

Aug 23, 2018

API

• Telegram.Bot (⭐3.3k) - .NET Client for Telegram Bot API

Business Intelligence

• NReco PivotData - in-memory data aggregation/OLAP library, pivot tables generation (render to HTML, exports), ASP.NET pivot builder control [$][Free for single-deployment/non-SaaS]

Machine Learning and Data Science

• ML.NET (⭐9.1k) - Cross-platform open-source machine learning framework which makes machine learning accessible to .NET developers.

Protocols

• SharpSnmpLib - An open source SNMP implementation for .NET/Mono/Xamarin. Version 1, 2c, and 3 are supported.

Jul 30, 2018

Application Frameworks

• CSLA .NET (⭐1.3k) - business layer development framework https://cslanet.com/

Caching

• Akavache (⭐2.5k) - An asynchronous, persistent key-value store

Database

• Realm Xamarin (⭐1.3k) - A fast, easy-to-use alternative to SQLite & ORMs - https://realm.io/docs/dotnet/latest/

GIS

• CoordinateSharp (⭐368) - Easily parse or convert coordinate formats and calculate location based solar/lunar information.

IDE

• Visual Studio Community - A full-featured IDE

Misc

• LINQPad - a C#/VB/F# scratchpad that instantly executes any expression, statement block or program with rich output formatting and a wealth of features. Also lets you interactively query databases in LINQ. [$]

Jul 20, 2018

GUI

• MaterialDesignInXamlToolkit - Toolkit for creating Material Design styled WPF apps

Jul 19, 2018

Compilers, Transpilers and Languages

• PeachPie (⭐2.4k) - PeachPie is a PHP compiler and runtime for .NET and .NET Core, which allows entire PHP applications to run on the modern, secure and performant .NET and .NET Core platforms.

Jul 08, 2018

WPF

• Extended WPF Toolkit™ (⭐4k) - A rich collection of controls, components and utilities for creating WPF applications

Jul 01, 2018

Media

• CSCore (⭐2.3k) - An advanced audio library, supporting playback/recording, decoding/encoding and processing of audio data in realtime (effects, visualizations, ...).

Jun 13, 2018

Application Frameworks

• .NET Boxed Framework (⭐725) - .NET Core Extensions and Helper NuGet packages

Application Templates

• .NET Boxed Templates (⭐3.4k) - .NET project templates with batteries included, providing the minimum amount of code required to get you going faster.

Jun 05, 2018

Media

• LibVLCSharp (⭐1.6k) - Xamarin bindings for libvlc, the multimedia framework powering the VLC applications made by VideoLAN.

Source Generator

• Discover .NET - Awesome .NET open source and community resources.

May 23, 2018

Game

• BEPUphysics (⭐2.5k) - BEPUphysics is a pure C# 3D physics library

May 20, 2018

Assembly Manipulation

• Fody (⭐4.4k) - Extensible tool for weaving .NET assemblies.

• ILRepack (⭐1.2k) - Open-source alternative to ILMerge.

CLI

• Gui.cs (⭐10k) - Terminal UI toolkit for .NET.

May 15, 2018

Source Generator

• Awesome Roslyn (⭐691) - A curated list of awesome Roslyn books, tutorials, open source projects, analyzers, code fixes, and refactorings.

May 09, 2018

Compilers, Transpilers and Languages

• Mond (⭐376) - A dynamically typed scripting language written in C# with a REPL, debugger, and simple embedding API.

May 07, 2018

Assets

• Bundle Transformer (⭐133) - Modular extension for Microsoft ASP.NET Web Optimization Framework. Its modules supports LESS, Sass, CoffeeScript, TypeScript, Mustache, Handlebars, Autoprefixer along with a bunch of different JS and CSS minifiers.

ETL

• Cinchoo ETL (⭐821) - ETL Framework for .NET (Read / Write CSV, Flat, Xml, JSON, Key-Value formatted files)

HTTP

• Refit (⭐8.9k) - The automatic type-safe REST library for Xamarin and .NET

Reactive Programming

• Rx.NET (⭐6.9k) - The Reactive Extensions (Rx) is a library for composing asynchronous and event-based programs using observable sequences and LINQ-style query operators

Testing

• NCrunch - An automated continuous & concurrent testing tool for Visual Studio. [$]

Visual Studio Plugins

• VSColorOutput - Color highlighting for Build, Find and Debug output windows. Custom match patterns and colors can be added.

WebSocket

• Crossertech - Provides a great set of tools for you to build real-time applications on the Microsoft.NET plattform and much more. [$]

Apr 30, 2018

Code Snippets

• .NET Fiddle - Write, compile and run C#, F# and VB code in the browser. The .Net equivalent of JSFiddle.

SDK and API Clients

• Getty Images API SDK (⭐12) - SDK for the Getty Images and iStock APIs

Apr 02, 2018

Machine Learning and Data Science

• GeneticSharp (⭐1.3k) - Multi-platform genetic algorithm library for .NET Core and .NET Framework. The library has several implementations of GA operators, like: selection, crossover, mutation, reinsertion and termination.

Mar 21, 2018

Media

• Xabe.FFmpeg (⭐730) - .NET Standard wrapper for FFmpeg. It allows to process media without know how FFmpeg works, and can be used to pass customized arguments to FFmpeg from C# application. [$]

Mar 08, 2018

Image Processing

• ImageSharp (⭐7.6k) - Fully managed cross-platform library for processing of image files.

Mar 01, 2018

CLI

• Argu (⭐470) - Declarative CLI argument & XML configuration parser for F# applications.

• CliWrap (⭐4.5k) - Wrapper for command line interfaces.

• Command Line Parser (⭐4.7k) - The Command Line Parser Library offers to CLR applications a clean and concise API for manipulating command-line arguments and related tasks

• Docopt (⭐357) - Command-line interface description language that will make you smile.

• Power Args (⭐572) - PowerArgs converts command-line arguments into .NET objects that are easy to program against. It also provides a ton of optional capabilities such as argument validation, auto generated usage, tab completion, and plenty of extensibility

Feb 14, 2018

Misc

• ConsoleTableExt (⭐336) - Fluent library to create table for .Net console application.

Feb 11, 2018

SDK and API Clients

• Countly SDK for Windows (⭐25) - Windows SDK for Countly analytics and marketing platform for product and marketing managers

Jan 27, 2018

Misc

• DeviceDetector.NET (⭐366) - The Universal Device Detection library will parse any User Agent and detect the browser, operating system, device used (desktop, tablet, mobile, tv, cars, console, etc.), brand and model.

Jan 23, 2018

Web Frameworks

• Giraffe (⭐2.2k) - Functional (F#) ASP.NET Core micro framework for building rich web applications

Jan 03, 2018

IDE

• Visual Studio Code - Excellent open source editor from Microsoft, based on Electron.

Dec 06, 2017

Application Frameworks

• AspectCore Framework (⭐1.7k) - AspectCore Framework is an Aspect-Oriented Programming based cross platform framework for .NET Core and .NET Framework. Core support for aspect-interceptor,dependency injection integration , web applications , data validation , and more.

Nov 29, 2017

Mail

• StrongGrid (⭐191) - Client for SendGrid's v3 API. Not only allows you to send emails, but also allows you to bulk import contacts, manage lists and segments, create custom fields for your lists, etc. Also includes a parser for SendGrid Webhooks.

Nov 09, 2017

Datetime

• NodaTime (⭐2.9k) - Noda Time is an alternative date and time API for .NET. It helps you to think about your data more clearly, and express operations on that data more precisely. https://nodatime.org/

Office

• DocX (⭐1.8k) - DocX is a .NET library that allows developers to manipulate Word 2007/2010/2013 files, it does not require Microsoft Word or Office to be installed.

Tools

• Fiddler - The free web debugging proxy for any browser, system or platform [Proprietary] [$] [Free Trial available]

Oct 28, 2017

Misc

• DeviceId (⭐814) - Generate a 'device ID' that can be used to uniquely identify a computer.

Oct 22, 2017

Misc

• YoutubeExplode (⭐3.1k) - Ultimate library for extracting metadata and downloading Youtube videos and playlists.

Oct 07, 2017

Application Templates

• Serene (⭐2.6k) - Serenity is an ASP.NET MVC application platform designed to simplify and shorten development of data-centric business applications with a service-based architecture. Serene is a starter template to build Serenity applications.

Build Automation

• FAKE (⭐1.3k) - F# Make, a cross-platform build automation system

• Cake (⭐4k) - Cake (C# Make) is a cross-platform build automation system with a C# DSL.

Caching

• Foundatio (⭐2k) - A common interface with in memory, Redis and hybrid implementations.

Database

• RavenDB (⭐3.7k) - A LINQ-enabled document database for .NET

• Marten (⭐3.1k) - PostgreSQL as a document database and event store for .NET applications

Database Drivers

• Npgsql (⭐3.4k) - .NET data provider for PostgreSQL

• MongoDB (⭐3.2k) - Official MongoDB C# driver

• Cassandra (⭐645) - DataStax .NET driver for Apache Cassandra

• Couchbase (⭐278) - Official Couchbase .NET client library, based on the Enyim memcached client

Datetime

• DateTimeExtensions (⭐854) - Common Date Time operations on the form of extensions to System.DateTime, including holidays and working days calculations on several culture locales.

• Exceptionless.DateTimeExtensions (⭐243) - DateTimeRange, Business Day and various DateTime, DateTimeOffset, TimeSpan extension methods.

Distributed Computing

• Akka.net (⭐4.8k) - Akka.NET is a port of the popular Java/Scala framework Akka to .NET. This is a community-driven port and is not affiliated with Typesafe who makes the original Java/Scala version.

• Zebus (⭐311) - Zebus is a lightweight, highly versatile, peer-to-peer service bus, built with CQRS principles in mind. It allows applications to communicate with each other in a fast and easy manner. Most of the complexity is hidden in the library and you can focus on writing code that matters to you, not debugging messaging code. A very fundamental base for any distributed application.

E-Commerce and Payments

• Stripe.Net (⭐1.4k) - Stripe.net is a full service .NET API for https://stripe.com/

• Virto Commerce (⭐1.3k) - Virto Commerce is the second generation release and is the only enterprise level e-commerce product fully available under Open Source license. Virto Commerce is based on .NET 4.5 with extensive use of MVC, IoC, EF, Azure, AngularJS and many other cutting edge technologies. It can be deployed in Microsoft Cloud (Azure), Amazon Web Services (AWS) and on-premise. https://virtocommerce.com

Event aggregator and messenger

• Mediator.Net (⭐374) - A simple mediator for .NET for sending command, publishing event and request response with pipelines supported

Game

• Wave Engine - Wave engine is a free C# component-based modern game engine which allows you to create cross-platform games supporting Kinect, Oculus Rift, Vuforia, Cardboard, Leap Motion and much more. [Free][Proprietary]

• Nez (⭐1.9k) - Nez is a free 2D-focused framework that works with MonoGame and FNA

Git Tools

• GitVersion (⭐2.9k) - Generate a Semantic Version Number based on the state of your Git repository

• LibGit2Sharp (⭐3.3k) - LibGit2Sharp brings all the might and speed of libgit2, a native Git implementation, to the managed world of .NET and Mono.

GUI

• MahApps.Metro (⭐9.5k) - Toolkit for creating Metro-styled WPF apps

• Eto.Forms (⭐3.7k) - Cross-platform GUI framework for desktop and mobile applications in .NET and Mono

HTML and CSS

• dotless (⭐692) - .NET port of the Ruby Less CSS lib http://www.dotlesscss.org

• ExCSS (⭐349) - CSS3 parser library for C#

HTTP

• RestSharp (⭐9.7k) - Simple REST and HTTP API client for .NET

Install tools

• Squirrel (⭐7.6k) - Squirrel is both a set of tools and a library, to completely manage both installation and updating your desktop Windows application.

• Chocolatey (⭐11k) - like yum or apt-get, but for Windows.

IoC

• Ninject (⭐2.7k) - The ninja of .NET dependency injectors

JavaScript Engines

• Edge.js (⭐5.4k) - Run .NET and Node.js code in-process on Windows, macOS, and Linux

Logging

• NLog (⭐6.4k) - NLog - Advanced .NET and Silverlight logging

• Logazmic (⭐59) - Open source NLog viewer for Windows

Mail

• PreMailer.Net (⭐664) - C# library that moves your stylesheets to inline style attributes, for maximum compatibility with e-mail clients.

Metrics

• Foundatio (⭐2k) - A common interface with in-memory, Redis, StatsD, and Metrics.NET implementations.

ORM

• Dapper.FastCRUD (⭐513) - The fastest micro-ORM extension for Dapper

• Insight.Database (⭐880) - Insight.Database is a fast, lightweight, micro-ORM for .NET

Package Management

• NuGet - The .NET package manager

Query Builders

• SqlKata - Elegant SQL query builder, that supports complex queries, joins, sub queries, nested where conditions, vendor engine targets and more

Queue

• Foundatio (⭐2k) - A common interface with in-memory, Redis and Azure implementations.

Search

• SolrNet (⭐948) - Solr client for .NET

Static Site Generators

• Sandra.Snow (⭐234) - Jekyll-inspired static site generation for .NET

Testing

• NUnit (⭐2.6k) - A unit-testing framework for all .NET languages

Tools

• CatLight - Build status notifications for TFS/Jenkins/Travis/Appveyor. Cross-platform desktop app based on .NET Core and Electron. [Free version available][Proprietary]

Web Frameworks

• Suave.IO - Framework/library/web server that makes you cry tears of joy after finishing your project ahead-of-time when you look at the beautiful code you've written in F#.

Oct 05, 2017

MVVM

• Win Application Framework (WAF) (⭐723) - A lightweight Framework that helps you to create well structured WPF and UWP Applications. It supports you in applying a Layered Architecture and the Model-View-ViewModel pattern.

Oct 04, 2017

GIS

• GeoJSON.NET (⭐454) - .Net library for GeoJSON types & corresponding Json.Net (de)serializers

Sep 24, 2017

Tools

• Fake JSON Server (⭐395) - Fake REST API for prototyping or as a CRUD Back End. No need to define types, uses dynamic typing. Data is stored to a single JSON file. Has authentication, WebSocket notifications, async long running operations, random generation for errors/delays and experimental GraphQL support.

Sep 22, 2017

Protocols

• FluentFTP (⭐3.2k) - An FTP and FTPS library for .NET, optimized for speed. Provides extensive FTP commands, file uploads/downloads and FTP proxies.

Sep 17, 2017

Office

• ExcelDataReader (⭐4.1k) - Lightweight and fast library written in C# for reading Microsoft Excel files (2.0-2007).

Sep 12, 2017

MVVM

• MVVM Dialogs (⭐688) - Framework simplifying the concept of opening dialogs from a view model when using MVVM in WPF or UWP.

Sep 11, 2017

Build Automation

• Nuke (⭐3.3k) - Cross-platform build automation system

Image Processing

• OpenCvSharp (⭐5.6k) - Cross platform wrapper of OpenCV for .NET Framework.

Logging

• BugSnag - Logs errors. Includes useful diagnostic info like stack trace, session, release, etc. Has a free tier. [Free for OSS][$]

Sep 09, 2017

Application Frameworks

• Mono (⭐11k) - Open source ECMA CLI, C#, F#, VB and .NET implementation

Aug 25, 2017

Database

• JsonFlatFileDataStore (⭐456) - Simple JSON flat file data store with support for typed and dynamic data

Aug 07, 2017

UI Automation

• Atata (⭐496) - Automated web testing full featured framework based on Selenium WebDriver.

Jul 26, 2017

CMS

• mojoPortal (⭐205) - MojoPortal is an extensible, cross database, mobile friendly, web content management system (CMS) and web application framework written in C# ASP.NET

Code Analysis and Metrics

• StyleCop - StyleCop analyzes C# source code to enforce a set of style and consistency rules

Image Processing

• Magick.NET (⭐3.6k) - .NET wrapper for the ImageMagick library.

JavaScript Engines

• ClearScript (⭐1.9k) - A library that makes it easy to add scripting to your .NET applications. It currently supports JavaScript (via V8 and JScript) and VBScript.

Jul 25, 2017

CLI

• SharpNetSH (⭐75) - A simple netsh library for C#.

Jul 23, 2017

Queue

• CAP (⭐6.8k) - An EventBus with local persistent message functionality for RabbitMQ or Kafka.

Jul 06, 2017

Cloud Storage

• Foundatio (⭐2k) - Cloud Storage library with AWS, Azure and many other providers supported.

Decompilation

• dotPeek - Free-of-charge standalone tool based on ReSharper's bundled decompiler. It can reliably decompile any .NET assembly into equivalent C# or IL code. It can create Visual Studio solutions based on the original binary files in a straight-forward way. [Proprietary] [Free]

Jun 12, 2017

Style Guide

• C# Style Guide - StackOverflow Q & A on style guides

• C# Coding Conventions - Official MSDN C# code conventions

Jun 11, 2017

IDE

• Consulo - A cross-platform IDE with C# & Java support, fork of IntelliJ IDEA Community Edition

WPF

• Data Grid Extensions (⭐851) - Modular extensions for the WPF DataGrid control, like filtering, additional column events, extended star-size column behavior, and more...

Jun 06, 2017

Scheduling

• DurableTask (⭐1.6k) - This framework allows users to write long running persistent workflows in C# using the async/await capabilities.

May 15, 2017

GUI

• Avalonia (⭐27k) - A multi-platform .NET UI framework (formerly known as Perspex).

May 12, 2017

IDE

• RoslynPad (⭐2.6k) - A simple C# editor based on Roslyn and AvalonEdit.

May 09, 2017

IoC

• VS MEF (⭐444) - Managed Extensibility Framework (MEF) implementation used by Visual Studio.

Apr 12, 2017

Distributed Computing

• protoactor-dotnet (⭐1.8k) - Proto Actor - Ultra fast distributed actors for Golang and C#

Apr 10, 2017

Code Analysis and Metrics

• NsDepCop (⭐209) - Static code analysis tool to enforce namespace dependency rules in C# projects.

Decompilation

• dnSpy (⭐27k) - open-source .NET assembly browser, editor, decompiler and debugger

Mar 31, 2017

Misc

• Enums.NET (⭐1.8k) - Enums.NET is a high-performance type-safe .NET enum utility library

Mar 28, 2017

Scheduling

• Hangfire - An easy way to perform fire-and-forget, delayed and recurring tasks inside .NET apps

Mar 24, 2017

Queue

• RabbitMQ.NET (⭐2.1k) - Implementation of an AMQP client library for C#, and a binding exposing AMQP services via WCF

Mar 22, 2017

E-Commerce and Payments

• SimplCommerce (⭐4.3k) - Super simple ecommerce system built on .NET Core. Simple to use and easy to customize. Thanks to .NET Core, you can run the SimplCommerce on Windows, Linux. With various RDBMS: Microsoft SQL Server, PostgreSQL, MySQL

Mar 16, 2017

Code Analysis and Metrics

• .NET Compiler Platform ("Roslyn") Analyzers (⭐1.6k) - A number of Roslyn diagnostic analyzers initially developed to help flesh out the design and implementation of the static analysis APIs.

Mar 09, 2017

ORM

• FluentMigrator (⭐3.3k) - Fluent Migrations framework for .net

Feb 28, 2017

Cryptography

• SecurityDriven.Inferno (⭐580) - .NET crypto library. Professionally audited.

Feb 24, 2017

SMS and Phone calls

• Twilio-csharp (⭐684) - A C#/.NET Library for sending and receiving phone calls and text messages with Twilio.

Feb 23, 2017

Interoperability

• pythonnet (⭐5k) - Python and .NET interop framework

Feb 19, 2017

Testing

• Expecto (⭐701) - A smooth testing framework for F# with tests as values. Unit testing, property based testing, performance testing and stress testing.

Feb 12, 2017

CMS

• Composite C1 (⭐254) - A web CMS that focus on UX and adaptability

Testing

• Fluent Assertions (⭐3.8k) - A set of .NET extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style test [Source Available] [Free for OSS]

Jan 26, 2017

Logging

• elmah.io - Cloud logging for .NET web applications using ELMAH. Find bugs before you go live. Powerful search, API, integration with Slack, GitHub, Visual Studio and more. [Free for OSS] [$]

Jan 19, 2017

Trading

• Lean (⭐11k) - Lean Engine is an open-source fully managed C# algorithmic trading engine built for desktop and cloud usage. https://www.quantconnect.com/lean/

Source Generator

• ASP.NET Core Library and Framework Support (⭐211) - A list of what .NET libraries and frameworks are currently supported by ASP.NET Core and .NET Core).

Jan 02, 2017

Web Frameworks

• DotVVM (⭐760) - MVVM framework for people who don't like to write JavaScript, with OWIN and ASP.NET Core support and a free extension for Visual Studio 2015 and 2017.

Dec 23, 2016

Serialization

• Hyperion (⭐276) - A high performance polymorphic serializer for the .NET framework.

Source Generator

• Weekly C# Digest - Weekly email newsletter with manually curated top 5 links from the .NET community.

Nov 17, 2016

Code Analysis and Metrics

• BenchmarkDotNet (⭐11k) - Powerful .NET library for benchmarking.

Nov 16, 2016

Compilers, Transpilers and Languages

• P (⭐3.2k) - P is a language for asynchronous event-driven programming.

Nov 06, 2016

Misc

• Jot (⭐639) - a library for persisting and restoring application state (a better alternative to .settings files).

Oct 27, 2016

Misc

• ByteSize (⭐578) - ByteSize is a utility class that makes byte size representation in code easier by removing ambiguity of the value being represented. ByteSize is to bytes what System.TimeSpan is to time.

UI Automation

• Managed Windows API - Introspect and automate third-party Windows / VC++ applications without needing its source code.

Oct 19, 2016

Functional programming

• language-ext (⭐6.7k) - This library uses and abuses the features of C# 6+ to provide a functional 'Base class library', that, if you squint, can look like extensions to the language itself. It also includes an 'Erlang like' process system (actors) that can optionally persist messages and state to Redis (note you can use it without Redis for in-app messaging). The process system additionally supports Rx streams of messages and state allowing for a complete system of reactive events and message dispatch.

Office

• ClosedXML (⭐5k) - ClosedXML makes it easier for developers to create Excel 2007/2010 files

Source Generator

• Awesome Unity (⭐6.8k) - A categorized community-driven collection of high-quality awesome Unity assets, projects, and resources.

Oct 18, 2016

IDE

• Rider - A cross-platform C# IDE based on the IntelliJ platform and ReSharper

Logging

• Loupe - Centralized .NET logging and monitoring. [Proprietary] [Free Tier]

Oct 17, 2016

Machine Learning and Data Science

• FsLab - A collection of data science and machine learning libraries for F# and .NET

Sep 27, 2016

Media

• NAudio (⭐5.7k) - Playback, decode and encode audio in a variety of file formats such as MP3, MP4, WAV, AIFF, Speex, etc.

Protocols

• SSH.NET (⭐4.1k) - A Secure Shell (SSH) library for .NET, optimized for parallelism. Provides SSH commands, SFTP/SCP uploads and downloads, and SOCKS4/SOCKS5/HTTP proxies.

Web Browsers

• CefSharp (⭐10k) - HTML5, CSS3 and JS web browser powered by Chromium, for WinForms and WPF

Sep 16, 2016

Image Processing

• ImageResizer - Add commands to image URLs to get altered versions in milliseconds. Resizing, editing etc of images in real-time.

JavaScript Engines

• Jint (⭐4.2k) - JavaScript interpreter for .NET which provides full ECMA 5.1 compliance and can run on any .NET platform.

• Jurassic (⭐906) - A implementation of the ECMAScript language and runtime. It aims to provide the best performing and most standards-compliant implementation of JavaScript for .NET.

Sep 12, 2016

Graphics

• OpenTK (⭐3.4k) - The Open Toolkit is an advanced, low-level C# library that wraps OpenGL, OpenCL and OpenAL

Sep 10, 2016

Database

• Yessql (⭐1.3k) - A .NET document database working on any RDBMS

Source Generator

• Awesome .NET Performance (⭐3.2k) - A curated list of awesome .NET Performance books, courses, trainings, conference talks, blogs and most inspiring open source contributors.

• awesome-ddd (⭐12k) - A curated list of Domain-Driven Design (DDD), Command Query Responsibility Segregation (CQRS), Event Sourcing, and Event Storming resources

Aug 31, 2016

Compilers, Transpilers and Languages

• Fable (⭐3k) - F# to JavaScript Compiler

Aug 30, 2016

Database

• Ignite (⭐4.9k) - Distributed in-memory platform: document database with SQL and LINQ support; distributed computations; distributed services and events.

IoC

• Scrutor (⭐3.8k) - Assembly scanning extensions for Microsoft.Extensions.DependencyInjection.

Markdown Processors

• markdig (⭐4.7k) - A fast, powerful, CommonMark compliant, extensible Markdown processor for .NET.

ORM

• LLBLGen Pro - Entity Modeling solution for Entity Framework, NHibernate, Linq to SQL and its own ORM framework: LLBLGen Pro Runtime Framework. [$][Free Lite version]

Aug 27, 2016

Serialization

• Migrant (⭐46) - Fast and flexible serialization framework usable on undecorated classes.

Source Generator

• Awesome .NET Core (⭐20k) - A collection of awesome .NET core libraries, tools, frameworks and software

Aug 24, 2016

Misc

• Aeron.NET (⭐490) - Efficient reliable UDP unicast, UDP multicast, and IPC message transport - .NET port of Aeron

• TypeShape (⭐306) - TypeShape is a small, extensible F# library for practical generic programming

Aug 23, 2016

IDE

• Ionide - An Atom Editor and Visual Studio Code package suite for cross platform F# development.

Aug 20, 2016

Build Automation

• Nake (⭐239) - Magic script-based C# task runner

Database

• Streamstone (⭐397) - Event store for Azure Table Storage

Aug 17, 2016

Continuous Integration

• AppVeyor - .NET Continuous Integration and Deployment as a service. [$] [Free for OSS]

Aug 10, 2016

ORM

• PetaPoco (⭐2.1k) - A tiny ORM-ish thing for your POCOs

Aug 09, 2016

Game

• MonoGame (⭐12k) - One framework for creating powerful cross-platform games

Jul 26, 2016

Internationalization

• MessageFormat.NET (⭐166) - ICU MessageFormat implementation in .NET lets you write contextual UI messages (PCL library)

Jul 08, 2016

Logging

• Exceptionless (⭐563) - Exceptionless .NET Client

Jun 30, 2016

Queue

• Warewolf ESB (⭐273) - An easy to use service bus and microservices platform. Easily build applications and services in a visual IDE.

Testing

• FakeItEasy (⭐1.7k) - The easy mocking library for .NET https://fakeiteasy.github.io

Jun 29, 2016

Minification

• Web Markup Minifier (⭐465) - .NET library that contains a set of markup minifiers. The objective of this project is to improve the performance of web applications by reducing the size of HTML, XHTML and XML code.

Jun 11, 2016

Cryptography

• Pkcs11Interop (⭐277) - Managed .NET wrapper for unmanaged PKCS#11 libraries that provide access to the cryptographic hardware

Jun 10, 2016

Application Templates

• ASP.NET Core Starter Kit (⭐1.2k) - backend: .NET Core, EF Core, C#; frontend: Babel, Webpack, React, CSS Modules

May 27, 2016

Documentation

• Sandcastle (⭐2.2k) - Sandcastle Help File Builder similar to NDoc

Apr 30, 2016

Mathematics

• Microsoft Automatic Graph Layout (⭐1.4k) - A set of tools for graph layout and viewing.

Apr 27, 2016

Tools

• Opserver (⭐4.5k) - Stack Exchange's Monitoring System

Apr 25, 2016

Source Generator

• awesome-analyzers (⭐557) - A curated list of .NET Compiler Platform ("Roslyn") diagnostic analyzers and code fixes.

Apr 20, 2016

API

• Mobius: C# API for Spark (⭐941) - Mobius adds C# language binding to Apache Spark, enabling the implementation of Spark driver code and data processing operations in C#.

Apr 09, 2016

Documentation

• DocFX (⭐4.2k) - Tools for building and publishing API documentation for .NET projects

Mar 29, 2016

Tools

• ShareX (⭐32k) - ShareX is a free and open source program that lets you capture or record any area of your screen and share it with a single press of a key. It also allows uploading images, text or other types of files to over 80 supported destinations you can choose from.

Mar 16, 2016

MVVM

• Prism (⭐6.5k) - A cross-platform desktop and mobile MVVM development framework.

Feb 22, 2016

Database Drivers

• Firebird.NET - The .NET Data provider is written in C# and provides a high-performance, native implementation of the Firebird API

State machines

• Stateless (⭐5.8k) - Create state machines and lightweight state machine-based workflows directly in .NET code

Feb 21, 2016

API

• ServiceStack (⭐5.4k) - Thoughtfully architected, obscenely fast, thoroughly enjoyable web services for all

Scheduling

• NCrontab (⭐935) - Class library for parsing & formatting crontab expressions as well as calculating occurrences of time based on a crontab schedule

Feb 09, 2016

Logging

• ELMAH - Official ELMAH site

Jan 18, 2016

Source Generator

• .NET-libraries-that-make-your-life-easier (⭐820) - Open Source .NET libraries that make your life easier

Jan 13, 2016

Distributed Computing

• Orleans (⭐10k) - Orleans is a framework that provides a straight-forward approach to building distributed high-scale computing applications, without the need to learn and apply complex concurrency or other scaling patterns. It was created by Microsoft Research.

Dec 08, 2015

ORM

• NPoco (⭐854) - Simple microORM that maps the results of a query onto a POCO object. Based on Schotime's branch of PetaPoco

Dec 04, 2015

Testing

• Bogus (⭐9.2k) - A simple and sane fake data generator for C#. Based on and ported from the famed faker.js.

Dec 02, 2015

Application Frameworks

• peasy (⭐512) - Peasy is a middle tier framework that offers an easy to use and flexible rules engine and was designed to address common challenges such as concurrency handling, transactional support, fault tolerance, threading, scalability, async and multiple client support, and easy testability, all without a huge learning curve!

IoC

• Simple Injector (⭐1.2k) - Simple Injector is an easy-to-use Dependency Injection (DI) library for .NET 4+ that supports Silverlight 4+, Windows Phone 8, Windows 8 including Universal apps and Mono.

Testing

• FsCheck (⭐1.2k) - Random Testing for .NET.

Nov 29, 2015

HTML and CSS

• AngleSharp (⭐5.3k) - Complete HTML5 DOM and CSS3 OM construction

Logging

• Elmah MVC (⭐264) - Elmah for MVC

Misc

• CsvHelper (⭐4.9k) - Library to help reading and writing CSV files https://github.com/JoshClose/CsvHelper (⭐4.9k)

• Humanizer (⭐8.8k) - Humanizer meets all your .NET needs for manipulating and displaying strings, enums, dates, times, timespans, numbers and quantities

Queue

• EasyNetQ (⭐2.9k) - An easy to use .NET API for RabbitMQ

Search

• Elasticsearch .NET (⭐3.6k) - Elasticsearch.Net & NEST

Nov 28, 2015

WebSocket

• SignalR (⭐9.2k) - Library for ASP.NET developers that makes it incredibly simple to add real-time web functionality to your applications

• SuperSocket (⭐4k) - SuperSocket is a light weight extensible socket application framework

Nov 21, 2015

Testing

• ExpressionToCode (⭐169) - Use plain C# syntax in assertions that include both the expression expression and subexpression values in the failure message.

Nov 01, 2015

Caching

• CacheManager (⭐2.4k) - A common interface and abstraction layer for caching.

Oct 25, 2015

Deployment

• DbUp (⭐2.4k) - .NET library that helps you to deploy changes to SQL Server databases. It tracks which SQL scripts have been run already, and runs the change scripts that are needed to get your database up to date

Office

• ExcelDna (⭐1.3k) - ExcelDna makes it easier to create and deploy Excel Add-Ins using C#, F# or VB .NET

Oct 09, 2015

CMS

• Orchard (⭐2.4k) - Free, open source, community-focused project aimed at delivering applications and reusable components on the ASP.NET platform

• Umbraco (⭐4.8k) - Umbraco is a free open source Content Management System built on the ASP.NET platform

Oct 04, 2015

Application Templates

• Side-Waffle (⭐655) - Large collection of useful templates for Web and Desktop development.

• Template10 (⭐1.4k) - Windows 10 templates with design patterns.

Oct 01, 2015

Git Tools

• posh-git (⭐7.9k) - A PowerShell environment for Git

Sep 30, 2015

Source Generator

• awesome-LINQ (⭐403) - A curated collection of awesome LINQ libraries, tools, and more.

Sep 21, 2015

Image Processing

• Emgu CV - Cross-platform .NET wrapper for the OpenCV library.

Sep 10, 2015

Game

• Duality (⭐1.4k) - Duality is a 2D game development framework. Focused on modularity, comes with a visual editor.

Aug 20, 2015

Compilers, Transpilers and Languages

• ClojureCLR (⭐1.6k) - A port of Clojure to the CLR, part of the Clojure project

Aug 18, 2015

Testing

• Machine.Specifications (⭐893) - Machine.Specifications (MSpec) is a context/specification framework that removes language noise and simplifies tests.

Aug 16, 2015

SDK and API Clients

• Azure PowerShell (⭐4.4k) - A set of PowerShell cmdlets for developers and administrators to develop, deploy and manage Microsoft Azure applications

Aug 03, 2015

Image Processing

• MetadataExtractor (⭐980) - Extracts Exif, IPTC, XMP, ICC and other metadata from image files.

Jul 24, 2015

ORM

• LINQ to DB (⭐3.1k) - The fastest LINQ database access library offering a simple, light, fast, and type-safe layer between your POCO objects and your database.

Jul 16, 2015

Testing

• Shouldly (⭐3.1k) - Shouldly is an assertion framework which focuses on giving great error messages when the assertion fails while being simple and terse.

Jul 10, 2015

GUI

• Fluent.Ribbon (⭐2.6k) - Fluent Ribbon Control Suite is a library that implements an Office- and Windows 8-like Ribbon for WPF.

Jul 06, 2015

Authentication and Authorization

• IdentityModel - Helper library for identity & access control in .NET 4.5 and MVC4/Web API.

Jun 29, 2015

Compilers, Transpilers and Languages

• F# (⭐2.2k) - The F# compiler, core library and tools - a functional programming language for safer, faster, better code writing.

Cryptography

• BouncyCastle - Together with the .Net System.Security.Cryptography, the reference implementation for cryptographic algorithms on the CLR.

Queue

• Rebus (⭐2.4k) - Rebus is a lean service bus implementation for .NET, similar in nature to NServiceBus and MassTransit, only leaner

Jun 20, 2015

Application Templates

• ProjectScaffold (⭐517) - A prototypical .NET solution recommended by the F# Foundation---includes file system setup, Paket for dependencies and FAKE for build/test automation. By default, build process also compiles documentation and generates NuGet packages.

MVVM

• Stylet (⭐1k) - Minimal MVVM framework inspired by Caliburn Micro, with good documentation, high test coverage, and its own IoC container

Jun 18, 2015

MVVM

• MVVMCross (⭐3.9k) - Cross-platform mvvm mobile development framework for WPF, Silverlight for WP7 and WP8, Mono for Android, MonoTouch for iOS, Windows Universal projects (WPA8.1 and Windows 8.1 Store apps). Makes extensive use of Portable Class Libraries (PCL) to provide maintainable cross platform C# native applications.

May 28, 2015

Template Engine

• DotLiquid (⭐1.1k) - C# port of the Ruby Liquid templating language

Apr 22, 2015

Assembly Manipulation

• Mono.Cecil (⭐2.8k) - Cecil is a library to generate and inspect programs and libraries in the ECMA CIL form.

Feb 27, 2015

Compression

• SharpCompress (⭐2.4k) - SharpCompress is a compression library for .NET/Mono/Silverlight/WP7 that can unrar, un7zip, unzip, untar unbzip2 and ungzip with forward-only reading and file random access APIs. Write support for zip/tar/bzip2/gzip are implemented

Interoperability

• CppSharp (⭐3.2k) - Tools to surface C++ APIs to C#

Media

• TagLib# (⭐1.3k) - TagLib# (aka taglib-sharp) is a library for reading and writing metadata in media files, including video, audio, and photo formats

Feb 24, 2015

Compilers, Transpilers and Languages

• Roslyn (⭐19k) - The .NET Compiler Platform ("Roslyn") provides open-source C# and Visual Basic compilers with rich code analysis APIs. It enables building code analysis tools with the same APIs that are used by Visual Studio.

Office

• Open XML SDK (⭐4.2k) - The Open XML SDK provides open-source libraries for working with Open XML Documents (DOCX, XLSX, and PPTX).

Dec 27, 2014

Graphics

• Oxyplot - OxyPlot is a cross-platform plotting library for .NET

IoC

• LightInject (⭐627) - A ultra lightweight IoC container

Nov 21, 2014

GIS

• NetTopologySuite (⭐1.5k) A .NET GIS solution that is fast and reliable for the .NET platform

Aug 27, 2014

MVVM

• ReactiveUI (⭐8.2k) - An MVVM framework for .NET that integrates the Reactive Extensions (Rx) framework, enabling developers to build elegant, testable applications using WPF, Windows Store Apps, WP8 or Xamarin.

Aug 04, 2014

Queue

• Hangfire (⭐9.6k) - Incredibly easy way to perform fire-and-forget, delayed and recurring tasks inside ASP.NET applications

Jul 26, 2014

IoC

• Spring.Net (⭐857) - Spring.NET is an open source application framework that makes building enterprise .NET applications easier

Jul 24, 2014

Mail

• MailKit (⭐6.4k) - A complete cross-platform mail stack including IMAP, POP3, SMTP, authentication and more. Built on top of MimeKit.

• MimeKit (⭐1.9k) - A cross-platform .NET MIME creation and parser library with support for S/MIME, PGP, TNEF and Unix mbox spools.

Jul 22, 2014

Application Frameworks

• ASP.NET Boilerplate (⭐12k) - A starting point for new modern ASP.NET MVC web applications with best practices and most popular tools.

Jul 21, 2014

Profiler

• MiniProfiler (⭐3k) - A simple but effective mini-profiler for ASP.NET websites

Scheduling

• QuartzNet (⭐6.7k) - Quartz Enterprise Scheduler .NET

Jul 20, 2014

MVVM

• Caliburn.Micro (⭐2.8k) - A small, yet powerful framework, designed for building applications across all XAML platforms. Its strong support for MV* patterns will enable you to build your solution quickly, without the need to sacrifice code quality or testability.

Serialization

• Json.NET (⭐11k) - Popular high-performance JSON framework for .NET

• Msgpack-Cli (⭐838) - MessagePack implementation for Common Language Infrastructure

Jul 19, 2014

Build Automation

• Invoke-Build (⭐675) - PowerShell build and test automation tool inspired by Psake.

Logging

• StackExchange.Exceptional (⭐861) - Error handler used for the Stack Exchange network

Queue

• MassTransit (⭐7.3k) - MassTransit is lean service bus implementation for building loosely coupled applications using the .NET Framework.

Jul 18, 2014

Logging

• Serilog (⭐7.5k) - A no-nonsense logging library for the NoSQL era. Combines the best of traditional and structured diagnostic logging in an easy-to-use package.

Jul 16, 2014

Build Automation

• Psake (⭐1.6k) - .NET-based build automation tool written in PowerShell

Caching

• CacheCow (⭐862) - An ASP.NET Web API HTTP caching implementation both on client and server

Database Drivers

• MySQL Connector - Connector/Net is a fully-managed ADO.NET driver for MySQL

IoC

• Autofac (⭐4.5k) - An addictive .NET IoC container

Logging

• Log4Net - The Apache log4net library is a tool to help the programmer output log statements to a variety of output targets

ORM

• NHibernate - NHibernate Object Relational Mapper

Queue

• NServiceBus (⭐2.1k) - The most popular service bus for .NET

• NetMQ (⭐3k) - NetMQ is 100% native C# port of ZeroMQ

SDK and API Clients

• AWS SDK (⭐2.1k) - The AWS SDK for .NET enables .NET developers to easily work with Amazon Web Services

• Octokit.NET (⭐2.8k) - A GitHub API client library for .NET

Testing

• AutoFixture (⭐3.4k) - AutoFixture is an open source framework for .NET designed to minimize the 'Arrange' phase of your unit tests

Web Servers

• EmbedIO (⭐1.5k) - Web server built on Mono and cross-platform

WebSocket

• Websocket-Sharp (⭐5.9k) - A C# implementation of the WebSocket protocol client and server