Awesome Kotlin Overview

A curated list of awesome Kotlin related stuff Inspired by awesome-java.

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Awesome Kotlin (https://kotlin.link)

A curated list of awesome Kotlin related stuff inspired by awesome-java. :octocat:

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Table of Contents

Github Trending

• Monthly
• Weekly
• Daily

Links

• Official Links
• Resources
• Blogs
• Courses
• Books

Libraries/Frameworks

• Web
• Testing
• Mocks and Fakes
• Dependency Injection
• Coroutines
• Functional Programming
• Serialization
• Validation
• Database
• Tools
• Compiler Plugins
• Continuous Integration
• Code Generators
• Desktop
• Http Clients
• Networking
• Editors
• Syntax Highlighters
• Game Development
• Misc
• Parsers
• Raspberry Pi
• Multiplatform
• Cryptography
• DSL
• Extensions
• Configuration
• Graphics
• Data Science
• Command Line Interface
• Browsers
• I/O
• API Clients
• Internationalisation and Localization
• Logging
• Mail
• Jetpack-Compose

Projects

• Web
• Build tools
• Misc
• Desktop
• Examples
• Idea Plugins
• Playground
• Android

Android

• Libraries
• Frameworks
• Projects
• Extensions
• Tools
• Tests
• Multiplatform
• Boilerplate

Kotlin JavaScript

• JavaScript
• Frontend
• Game Development
• Build Tools
• Integration

Kotlin Native

• Projects
• Frameworks

Kotlin WebAssembly

• Official Links
• Examples

Github Trending ^{Back ⇈}

Monthly ^{Back ⇈}

• stantanasi/streamflix (⭐598) - An Android TV and mobile app to stream movies and TV shows for free
• keymapperorg/KeyMapper (⭐1.1k) - An Android app that change what the buttons do on your devices!
• etchdroid/etchdroid (⭐1.4k) - An application to write OS images to USB drives, on Android, no root required.
• YenalyLiew/Han1meViewer (⭐1.6k) - An Unofficial Hanime1.me Application for Android.
• amir1376/ab-download-manager (⭐1.7k) - A Download Manager that speeds up your downloads
• OxygenCobalt/Auxio (⭐2.1k) - A simple, rational music player for android
• home-assistant/android (⭐2.3k) - 📱 Home Assistant Companion for Android
• videolan/vlc-android (⭐2.7k) - VLC for Android, Android TV and ChromeOS
• Dr-TSNG/Hide-My-Applist (⭐3k) - An Xposed module to intercept applist detections
• z-huang/InnerTune (⭐4.4k) - A Material 3 YouTube Music client for Android
• android/camera-samples (⭐5k) - Multiple samples showing the best practices in camera APIs on Android.
• florisboard/florisboard (⭐6.1k) - An open-source keyboard for Android which respects your privacy. Currently in early-beta.
• bitwarden/android (⭐6.4k) - Bitwarden mobile app for Android.
• ethereum-lists/chains (⭐8.8k) - provides metadata for chains
• thunderbird/thunderbird-android (⭐11k) - Thunderbird for Android – Open Source Email App for Android (fka K-9 Mail)
• MatsuriDayo/NekoBoxForAndroid (⭐11k) - NekoBox for Android / sing-box / universal proxy toolchain for Android
• mamoe/mirai (⭐14k) - 高效率 QQ 机器人支持库
• android/nowinandroid (⭐17k) - A fully functional Android app built entirely with Kotlin and Jetpack Compose
• 2dust/v2rayNG (⭐35k) - A V2Ray client for Android, support Xray core and v2fly core
• JetBrains/kotlin (⭐49k) - The Kotlin Programming Language.

Weekly ^{Back ⇈}

• meshtastic/Meshtastic-Android (⭐725) - Android application for Meshtastic
• toasterofbread/spmp (⭐1k) - A YouTube Music client with a focus on customisation of colours and song metadata. Built with Compose Multiplatform for Android and desktop.
• CCBlueX/LiquidBounce (⭐1.5k) - A free mixin-based injection hacked client for Minecraft using the Fabric API
• mollyim/mollyim-android (⭐1.6k) - Enhanced and security-focused fork of Signal.
• maxrave-dev/SimpMusic (⭐1.8k) - A simple music app using YouTube Music for backend
• FooIbar/EhViewer (⭐2.4k) - EhViewer overhauled with Material Design 3 and more, forked from https://github.com/Ehviewer-Overhauled/Ehviewer (⭐5.2k)
• d4rken-org/sdmaid-se (⭐2.7k) - SD Maid 2/SE is Android's most thorough cleaning tool.
• simondankelmann/Bluetooth-LE-Spam (⭐3.9k)
• bmax121/APatch (⭐4.5k) - The patching of Android kernel and Android system
• pinterest/ktlint (⭐6.2k) - An anti-bikeshedding Kotlin linter with built-in formatter
• recloudstream/cloudstream (⭐6.7k) - Android app for streaming and downloading media.
• yairm210/Unciv (⭐8.5k) - Open-source Android/Desktop remake of Civ V
• tiann/KernelSU (⭐10k) - A Kernel based root solution for Android
• gkd-kit/gkd (⭐21k) - 基于无障碍，高级选择器，订阅规则的自定义屏幕点击 Android 应用 | An Android APP with custom screen tapping based on Accessibility, Advanced Selectors, and Subscription Rules
• bannedbook/fanqiang (⭐38k) - 翻墙-科学上网

Daily ^{Back ⇈}

• lizongying/my-tv-0 (⭐1.8k) - 電視網絡視頻播放軟件，可以自定義視頻源
• keiyoushi/extensions-source (⭐2k) - Source code of extensions for Tachiyomi/Mihon and variants.
• ReVanced/revanced-patches (⭐2.3k) - 🧩 Patches for ReVanced
• jellyfin/jellyfin-androidtv (⭐2.8k) - Android TV Client for Jellyfin
• ankidroid/Anki-Android (⭐8.6k) - AnkiDroid: Anki flashcards on Android. Your secret trick to achieve superhuman information retention.
• libre-tube/LibreTube (⭐8.7k) - An alternative frontend for YouTube, for Android.
• RikkaApps/Shizuku (⭐11k) - Using system APIs directly with adb/root privileges from normal apps through a Java process started with app_process.
• signalapp/Signal-Android (⭐26k) - A private messenger for Android.
• shadowsocks/shadowsocks-android (⭐35k) - A shadowsocks client for Android

Links ^{Back ⇈}

Official Links ^{Back ⇈}

• Home Page
• Language Reference
• Slack (38k+ users)
• Try Kotlin!
• Blog
• Issue Tracker
• Twitter
• Kotlin Forum
• Kotlin/KEEP (⭐3.4k) - Kotlin Evolution and Enhancement Process
• JetBrains/kotlin (⭐49k) - The Kotlin Programming Language.

Resources ^{Back ⇈}

• Awesome Kotlin Jobs (⭐17) - A curated list of companies using Kotlin
• Jobs for Kotlin Developers - All job listings require Kotlin skills
• Podcast: Talking Kotlin - A Podcast on Kotlin and more
• Kotlin Subreddit
• Trending Kotlin on Github
• Programming Community Curated Resources for learning Kotlin
• LinkedIn: Kotlin Developers (Join!)
• Kotlin Cheat Sheet
• Kotlin Kōans Android app - Learn Kotlin with short coding challenges on your Android device
• Kotlin Guide - An introduction to Kotlin
• Kotlin Quiz - Are You a Kotlin Expert? Test Your Skills with the Kotlin Quiz!
• Kotlin syntax cheat sheet
• Kotlin Standard Functions cheat-sheet - Learn how to use kotlin's standard library with lambda functions
• Kotlin: An Illustrated Guide - Illustrated guide to learn Kotlin
• AlexeySoshin/Hands-on-Design-Patterns-with-Kotlin (⭐31) - Code examples for 'Hands-on Design Patterns with Kotlin' book
• From Java To Kotlin (⭐563) - From Java to Kotlin Cheat Sheet
• dbacinski/Design-Patterns-In-Kotlin (⭐5.9k) - Design Patterns implemented in Kotlin

Blogs ^{Back ⇈}

• Antonio Leiva - Android and any other monsters
• freecodecamp Kotlin article collection
• Kotlin Expertise Blog - A Blog with many articles covering basic and advanced Kotlin topics.
• SuperKotlin - A website about Kotlin
• Kt. Academy Medium - Blog that teach about Kotlin
• Kt. Academy - Publication with regular Kotlin posts.
• KotlinTesting Blog - Blog about testing with Kotlin

Courses ^{Back ⇈}

• Jetbrain's Hyperskill Academy - An interactive learning platform for Kotlin and other languages
• Google's Kotlin Codelab - Build your first Kotlin Android App
• Android Kotlin Fundamentals - Android Kotlin Fundamentals leads you through a series of codelabs that teach you the fundamentals of building Android apps in Kotlin.
• Kotlin for Java Developers - 160-minute Android Course.
• Kotlin Programming: Next Level Java Development - Learn coding in Kotlin from scratch!
• Introduction to Kotlin Programming by Hadi Hariri - From Hello World to Interoperability with Java
• Advanced Kotlin Programming - From Nested Functions to Asynchronous Programming
• Kotlin an Introduction - Caster.io - Kotlin introductory course at Caster.io
• Building Android Apps with Kotlin: Getting Started - Alex Dunn - Dive into the language set to replace Java while building Android applications. This course will give you a foundation of both Kotlin and Android skills to allow you to build apps faster and cleaner than ever before.
• Kotlin Bootcamp for Programmers - Google - Language fundamentals for developers
• Developing Android Apps with Kotlin - Google - Create concise, secure and performant apps with Kotlin
• Kotlin for Android Developers - Convert an Android app from Java to Kotlin
• Kotlin for Java Developers - JetBrains - Detailed Kotlin introductory course for Java developers
• Kotlin Online Courses at Classpert - Over 80 Kotlin Online Courses - Classpert Online Course and MOOC Search
• Test-Driven Development Tutorial for Android: Getting Started - By Victoria Gonda - Learn the basics of test-driven development, or TDD, and discover how to use TDD effectively when developing your Android apps!
• Kotlin Course - Tutorial for Beginners by freeCodeCamp.org - Learn the Kotlin programming language in this introduction to Kotlin. Kotlin is a general purpose, open source, statically typed “pragmatic” programming language. It is used for many things, including Android development.
• CS194A Android Development - Learn basic, foundational techniques for developing Android mobile applications and apply those toward building a single or multi page, networked Android application
• Server-side with Kotlin Series - Learn how to use Kotlin for a variety of purposes such as Functional Programming, Image Detection, Building Microservices, Developing Backend, etc.
• Programming Fundamentals in Kotlin - Practice and expand on the fundamentals of programming that are core to any language as well as the unique aspects of Kotlin syntax.
• Advanced Programming in Kotlin - Get ready to expand on your Kotlin skills to create common advanced functionality that typical Android apps need.

Books ^{Back ⇈}

• Kotlin in Action - Dmitry Jemerov, Svetlana Isakova
• Kotlin in Action, Second Edition
• Kotlin for Android Developers - Antonio Leiva
• Functional Programming in Kotlin - Marco Vermeulen, Rúnar Bjarnason, and Paul Chiusano
• Programming Kotlin - Stephen Samuel, Stefan Bocutiu
• Fundamental Kotlin, First Edition - Learn Kotlin quickly from the start
• Android Development with Kotlin - Marcin Moskala, Igor Wojda - Learn how to make Android development much faster using a variety of Kotlin features, from basics to advanced, to write better quality code
• Mastering Android Development with Kotlin - Miloš Vasić - Master Android development using a variety of Kotlin features
• Functional Kotlin - Learn Functional Programming in Kotlin from scratch and how to apply Functional Programming with Kotlin to real-life projects with popular libraries like Arrow. By Mario Arias, Rivu Chakraborty
• Reactive Programming in Kotlin - Rivu Chakraborty - Learn how to implement Reactive Programming paradigms with Kotlin, and apply them to Web programming with Spring Framework 5.0 as well as in Android Application Development. By Rivu Chakraborty
• Kotlin Apprentice - Irina Galata, Joe Howard, Richard Lucas & Ellen Shapiro - Beginning programming with Kotlin
• Android Apprentice - Darryl Bayliss & Tom Blankenship - Beginning Android programming using Kotlin
• Hands-on Design Patterns with Kotlin - Alexey Soshin - Book that covers building scalable applications using traditional, reactive, and concurrent design patterns in Kotlin
• Advanced Android App Architecture - In Advanced Android App Architectures, you'll find a diverse and hands-on approach to architecting your apps on Android
• Data Structures & Algorithms in Kotlin - Irina Galata & Matei Suica - A book that teaches you the fundamental tools of implementing key data structures in Kotlin, and how to use them to solve algorithms
• Effective Kotlin
• Head First Kotlin - Head First Kotlin is a complete introduction to coding in Kotlin
• Kotlin Coroutines: Deep Dive - A practical book dedicated to Kotlin Coroutines, common use-cases, best practices and deep understanding.
• Kotlin Crash Course - Quickly master Kotlin by practicing what you learn in eight interactive projects, including REST APIs, serverless deployments, and more.

Libraries/Frameworks ^{Back ⇈}

Web ^{Back ⇈}

• welvet/summer - Lightweight Jetty/JDBC wrapper library inspired by SparkJava and MyBatis with DI and Testing support for Kotlin
• spypunk/sponge (⭐1) - A website crawler and links downloader command line tool written in Kotlin
• laviua/komock (⭐10) - HTTP/Consul/SMTP/Spring Config mocker framework written in Kotlin
• AurityLab/graphql-kotlin-toolkit (⭐10) - GraphQL toolkit for Kotlin (includes code generator and spring boot integration)
• allangomes/kotlinwind.css (⭐16) - Kotlin DSL for CSS based on Tailwind.
• phenax/h (⭐18) - HTML templating library written in Kotlin
• darkredz/zeko-restapi-framework (⭐19) - Asynchronous web framework for Kotlin. Create REST APIs in Kotlin easily with automatic Swagger/OpenAPI doc generation
• moia-dev/lambda-kotlin-request-router (⭐20) - A REST request routing layer for AWS lambda handlers written in Kotlin
• celtric/kotlin-html (⭐24) - A library to generate HTML in Kotlin.
• Ahoo-Wang/CoSec (⭐32) - RBAC-based And Policy-based Multi-Tenant Security Framework.
• sepatel/tekniq (⭐38) - Full-feature HTTP DSL Framework, HTTP Client, JDBC DSL, Loading Cache and Configuration
• danneu/kog (⭐43) - A web framework focused on simplicity, middleware, and functional composition
• Flaxoos/flax-ktor-plugins (⭐60) - A Ktor plugins repository for servers and clients, including a kafka client plugin, circuit breaker and more
• gimlet2/kottpd (⭐74) - REST framework in pure Kotlin, inspired by spark-java
• jean79/yested (⭐84) - A Kotlin framework for building web applications in Javascript.
• MarioAriasC/KotlinPrimavera (⭐87) - Spring support libraries for Kotlin.
• ButterCam/sisyphus (⭐94) - Modern gRPC service framework based on Kotlin/Spring Boot with Message DSL/HTTP transcoding/Google AIP support.
• brianmadden/krawler (⭐128) - A web crawling framework written in Kotlin
• taskworld/kraph (⭐151) - GraphQL request string builder written in Kotlin
• kohesive/kovert (⭐155) - An invisible, super easy and powerful REST and Web framework over Vert.x or Undertow.
• alpas/alpas (⭐180) - Kotlin web framework inspired by Laravel/Rails. Easy, elegant and productive.
• mvysny/vaadin-on-kotlin (⭐186) - A simple way to write full-stack database-backed component-oriented web apps
• Ahoo-Wang/Wow (⭐187) - A Modern Reactive CQRS Architecture Microservice development framework based on DDD and EventSourcing.
• vert-x3/vertx-lang-kotlin (⭐295) - This module provides Kotlin language bindings including DSL and extension functions for vert.x 3
• hypercube1024/firefly (⭐296) - An asynchronous web framework for rapid development of high-performance web application.
• aPureBase/KGraphQL (⭐301) - A GraphQL implementation written in Kotlin
• SeunAdelekan/Kanary (⭐328) - A micro webframework for Kotlin
• TinyMission/kara (⭐470) - Web framework written in Kotlin.
• hhariri/wasabi (⭐501) - An HTTP Framework built with Kotlin for the JVM.
• hexagontk/hexagon - A Microservices toolkit that takes care of HTTP, serialization and templates.
• nacular/doodle - A pure Kotlin UI framework for the Web (and Desktop)
• jwstegemann/fritz2 (⭐657) - small lib to build reactive web-apps in pure Kotlin based on Flows
• perwendel/spark-kotlin (⭐987) - A DSL in idiomatic Kotlin for the Spark web framework.
• jetbrains/kotless (⭐1.2k) - Kotlin serverless framework reducing the routine of serverless deployment.
• varabyte/kobweb - A modern framework for full stack web apps in Kotlin
• Kotlin/kotlinx.html (⭐1.6k) - Kotlin DSL for HTML.
• jooby-project/jooby (⭐1.7k) - Modular micro web framework for Java and Kotlin
• ExpediaDotCom/graphql-kotlin (⭐1.7k) - Code-only GraphQL schema generation for Kotlin
• http4k/http4k - Toolkit for serving and consuming HTTP services in a functional and consistent way.
• apollographql/apollo-android (⭐3.8k) - Typesafe GraphQL client for the JVM and Kotlin native
• tipsy/javalin (⭐7.6k) - A Simple REST API Library for Java/Kotlin.
• ktorio/ktor - Web backend framework for Kotlin. Easy to use, fun and asynchronous.

Testing ^{Back ⇈}

• iotacb/ChefkochAPI - Kotlin/Java library, to parse and get information of recipes from chefkoch
• krzema12/vis-assert (⭐6) - Test the shape of your functions!
• dmcg/k-sera (⭐8) - A JMock wrapper for Kotlin.
• neworld/kupiter (⭐14) - Kotlin DSL for Junit5
• HelloCuriosity/model-forge (⭐16) - A Kotlin library for auto generating models for tests.
• from-source/kiwi (⭐17) - Fluent assertions library with support of json path.
• willowtreeapps/opentest4k (⭐20) - kotlin multiplatform implementation/bindings of opentest4j
• mvysny/DynaTest (⭐22) - Write your tests in DSL way. Runs on JUnit5 Platform.
• dmcg/konsent (⭐29) - An acceptance test library for Kotlin.
• EranBoudjnah/RandomGenKt (⭐37) - Initialize instances of any class with generated data.
• EranBoudjnah/TestIt (⭐44) - Generate unit testing boilerplate from kotlin files.
• diffplug/selfie - Snapshot testing (inline, on disk, and memoization)
• qwertukg/SeleniumBuilder (⭐55) - DSL for Selenium 2.0. Provide a possibility to write tests in Kotlin builder style.
• permissions-dispatcher/kompile-testing (⭐70) - Testing tools for kotlinc and kapt.
• EPadronU/balin (⭐72) - Balin is a browser automation library for Kotlin. It's basically a Selenium-WebDriver wrapper library inspired by Geb.
• xgouchet/Elmyr (⭐83) - A utility to make Kotlin/Java tests random yet reproducible
• dmcg/minutest (⭐101) - Simple, Expressive, Extensible Testing for Kotlin on the JVM
• karumi/KotlinSnapshot (⭐165) - Verify your data with snapshot testing.
• Trendyol/stove (⭐165) - The easiest way of writing e2e tests for your JVM back-end API with Kotlin
• winterbe/expekt (⭐172) - BDD assertion library for Kotlin.
• lupuuss/Mokkery (⭐183) - The mocking library for Kotlin Multiplatform, easy to use, boilerplate-free and compiler plugin driven.
• codecentric/hikaku (⭐197) - A library that tests if the implementation of a REST-API meets its specification.
• sokomishalov/skraper (⭐253) - Kotlin/Java library, cli tool and telegram-bot for scraping posts and media from various sources with neither authorization nor full page rendering (Facebook, Instagram, Twitter, Youtube, Tiktok, Telegram, Twitch, Reddit, Pinterest, Flickr, Tumblr, etc.)
• npryce/hamkrest (⭐344) - A reimplementation of Hamcrest to take advantage of Kotlin language features.
• serpro69/kotlin-faker (⭐469) - Port of ruby faker gem written in kotlin
• Ninja-Squad/springmockk (⭐487) - SpringMockK: MockBean and SpyBean, but for MockK instead of Mockito
• Kotlin/kotlinx-benchmark (⭐506) - A powerful library for benchmarking in Kotlin.
• robfletcher/strikt (⭐555) - An assertion library for Kotlin
• robstoll/atrium (⭐566) - Multiplatform assertion library for Kotlin supporting i18n.
• tschuchortdev/kotlin-compile-testing (⭐665) - A library for testing Kotlin and Java annotation processors, compiler plugins and code generation
• willowtreeapps/assertk (⭐762) - assertions for kotlin inspired by assertj
• skrapeit/skrape.it (⭐815) - A DSL-driven HTML/XML parser-library that enables meaningful testing of rendered HTML templates.
• MarkusAmshove/Kluent (⭐867) - Fluent Assertion-Library for Kotlin.
• JetBrains/spek (⭐2.2k) - A specification framework for Kotlin.
• nhaarman/mockito-kotlin (⭐3.1k) - Using Mockito with Kotlin.
• kotest/kotest (⭐4.4k) - Formerly known as KotlinTest, Kotest is a flexible and comprehensive testing tool that is multiplatform enabled.
• mockk/mockk (⭐5.4k) - Pure Kotlin mocking library.

Mocks and Fakes ^{Back ⇈}

• bluegroundltd/kfactory (⭐58) - Fixture factory in Kotlin
• moove-it/fakeit (⭐535) - Generates realistic fake data — like names, emails, dates, countries — to be used in your Android development environment.

Dependency Injection ^{Back ⇈}

• Rasalexman/KODI (⭐15) - light-weight KOtlin Dependency Injection Framework with or without reflection module without kapt
• JLLeitschuh/kotlin-guiced (⭐18) - Convenience Kotlin API over the Google Guice DI Library.
• authzee/kotlin-guice (⭐66) - Guice DSL extensions for Kotlin
• sergeshustoff/dikt (⭐141) - Simple and powerful DI for kotlin multiplatform
• corbella83/PopKorn (⭐155) - Forget about modules and components. DI can be simple
• traversals/kapsule (⭐164) - Minimalist dependency injection library for Kotlin.
• evant/kotlin-inject (⭐1.3k) - Dependency injection lib for kotlin
• Kodein-Framework/Kodein-DI (⭐3.2k) - Painless Kotlin Dependency Injection.
• Ekito/koin (⭐9k) - A functional Kotlin dependency injection framework for Android and JVM.

Coroutines ^{Back ⇈}

• soywiz/korio (⭐1) - Korio: Kotlin cORoutines I/O: Streams + Async TCP Client/Server + Virtual File System for JVM, Node.JS and Browser.
• KingFalse/harrier (⭐4) - Simpler use of multithreading in Kotlin.
• Rasalexman/coroutinesmanager (⭐15) - try-catch safety coroutines manager
• rozkminiacz/FlowRiddles (⭐36) - Repository for learning Kotlin Flow API
• cloudoptlab/cloudopt-next (⭐343) - A next-generation Java web lightweight framework based on vertx and kotlin.
• konrad-kaminski/spring-kotlin-coroutine (⭐449) - Kotlin coroutine support for Spring.
• marcoferrer/kroto-plus (⭐493) - Protoc plugin for bringing together Kotlin, Protobuf, Coroutines, and gRPC.
• Kotlin/kotlinx.coroutines (⭐13k) - Libraries built upon Kotlin coroutines.

Functional Programming ^{Back ⇈}

• poetix/klenses (⭐48) - Lenses for Kotlin.
• beyondeye/Reduks (⭐111) - A "batteries included" port of Reduxjs for Kotlin+Android
• pakoito/Komprehensions (⭐117) - Do comprehensions for Kotlin and 3rd party libraries.
• h0tk3y/kotlin-monads (⭐120) - Monads for Kotlin
• fork-handles/result4k (⭐221) - Result monad for type safe error handling in Kotlin
• pardom/redux-kotlin (⭐271) - Direct port of Redux for Kotlin.
• RubyLichtenstein/RxTest (⭐281) - Kotlin DSL for testing RxJava2
• arrow-kt/arrow-meta (⭐396) - Functional companion to Kotlin's Compiler.
• brianegan/bansa (⭐444) - A state container for Kotlin & Java, inspired by Elm & Redux.
• kittinunf/Result (⭐918) - The modelling for success/failure of operations in Kotlin.
• michaelbull/kotlin-result (⭐1k) - A Result monad for modelling success or failure operations - inspired by Elm, Rust, & Haskell.
• reactor/reactor-core (⭐5k) - Non-Blocking Reactive Streams Foundation for the JVM. Natively supports Kotlin, since 3.1.0.M3.
• arrow-kt/arrow (⭐6.2k) - Functional companion to Kotlin's Standard Library.
• ReactiveX/RxKotlin (⭐7k) - RxJava bindings for Kotlin.

Serialization ^{Back ⇈}

• marifeta/kvalidator (⭐6) - Kotlin validator (compatible with laravel validation rules) for json kotlinx.serialization!
• Shengaero/kotlin-json (⭐7) - A lightweight, stylistic, optimized, and multiplatform JSON library for Kotlin-JVM and Kotlin-JS
• qwertukg/xml-builder (⭐8) - Simplest XML builder for Kotlin
• holgerbrandl/jsonbuilder (⭐18) - A tiny DSL to create json using idiomatic Kotlin
• s4kibs4mi/kotlin-jsonq (⭐30) - A simple Kotlin library to Query over Json Data.
• fluidsonic/fluid-json (⭐31) - A JSON library written in pure Kotlin.
• Jire/KTON (⭐60) - Object notation in pure Kotlin!
• knbt (⭐77) - Minecraft NBT support for kotlinx.serialization
• lectra-tech/koson (⭐88) - A concise and lightweight Kotlin DSL to build JSON objects and render their String representations
• aafanasev/kson (⭐109) - Auto-generate GSON type adapters for Kotlin data classes
• FasterXML/jackson-module-kotlin (⭐1.1k) - Jackson module that adds support for serialization/deserialization of Kotlin classes and data classes.
• cbeust/klaxon (⭐1.9k) - Lightweight library to parse JSON in Kotlin.
• Kotlin/kotlinx.serialization (⭐5.4k) - Kotlin multiplatform / multi-format reflectionless serialization

Validation ^{Back ⇈}

• deva666/KValidation (⭐24) - Validation library
• LeoColman/SimpleCpfValidator (⭐24) - Simple Brazilian taxpayer document (CPF) validator
• kciter/thing (⭐65) - A rule-based entity management library written in Kotlin
• konform-kt/konform (⭐668) - Multiplatform validations for Kotlin data classes

Database ^{Back ⇈}

• Ganet/rxaerospike (⭐7) - RxJava2 wrapper for aerospike-client-java.
• shyiko/levelkt (⭐15) - LevelDB client for Kotlin and/or Java 8+.
• SubiyaCryolite/jds (⭐22) - Jenesis Data Store: a dynamic, cross platform, high performance, ORM data-mapper. Designed to assist in rapid development and data mining.
• KotlinPorts/kt-postgresql-async (⭐23) - Kotlin/Gradle port of mauricio's async driver for postgres/mysql.
• pm-dev/kotlin-gremlin-ogm (⭐32) - Kotlin-gremlin-ogm is a type-safe object/graph mapping library for Gremlin enabled graph databases.
• fluidsonic/fluid-mongo (⭐33) - Coroutine support for MongoDB built on top of the official Reactive Streams Java Driver
• bloomberg/selekt - Android SQL database library wrapping the community edition of SQLCipher, an SQLite extension that provides 256-bit AES encryption. Selekt realises the maximum concurrency offered by SQLite3.
• coupang/spring-data-requery (⭐46) - Spring Data for Requery (lightweight ORM)
• darkredz/Zeko-SQL-Builder (⭐105) - Zeko SQL Builder is a high-performance lightweight SQL query library written for Kotlin language
• smyrgeorge/sqlx4k (⭐111) - A small non-blocking database driver written in Kotlin for the Native platform.
• andrewoma/kwery (⭐203) - Kwery is an SQL library for Kotlin.
• seratch/kotliquery (⭐207) - A handy database access library in Kotlin.
• cheptsov/kotlin-nosql (⭐212) - NoSQL database query and access library for Kotlin.
• ctripcorp/SQLlin (⭐224) - A DSL SQLite library for Kotlin Multiplatform
• TouK/krush (⭐248) - Idiomatic persistence layer for Kotlin, based on Exposed. It’s based on a compile-time JPA annotation processor that generates Exposed DSL table and objects mappings from your data classes.
• consoleau/kotlin-jpa-specification-dsl (⭐249) - This library provides a fluent DSL for querying spring data JPA repositories using spring data Specifications.
• komapper/komapper (⭐301) - Komapper is an ORM library for server-side Kotlin with JDBC and R2DBC support.
• Litote/kmongo (⭐781) - KMongo - Kotlin toolkit for Mongo
• dizitart/nitrite-database (⭐835) - Potassium Nitrite is a kotlin extension of nitrite database, an open source nosql embedded document store with mongodb like api.
• JetBrains/xodus (⭐1.2k) - Transactional schema-less embedded database used by JetBrains YouTrack and JetBrains Hub.
• ebean-orm/ebean (⭐1.5k) - Ebean is a Java & Kotlin ORM including type safe kotlin queries
• jasync-sql/jasync-sql (⭐1.7k) - Kotlin port of mauricio's async driver for postgres/mysql.
• kotlin-orm/ktorm (⭐2.1k) - A lightweight ORM Framework for Kotlin. Provides strong-typed and flexible SQL DSL and convenient sequence APIs to reduce our duplicated effort on database operations.
• mongodb/mongo-java-driver (⭐2.6k) - The official MongoDB Kotlin Driver allows developers to build server-side Kotlin applications with MongoDB.
• requery/requery (⭐3.1k) - Modern SQL based query & persistence for Java/Kotlin/Android.
• objectbox/objectbox-java (⭐4.4k) - Embedded on-device object database for Mobile Apps and IoT.
• Raizlabs/DBFlow (⭐4.9k) - A blazing fast, powerful, and very simple ORM android database library that writes database code for you.
• jankotek/mapdb (⭐4.9k) - MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap-memory. It is a fast and easy to use embedded Java database engine.
• square/sqldelight (⭐6.2k) - Generates Java models from CREATE TABLE statements.
• JetBrains/Exposed (⭐8.3k) - Exposed is a prototype for a lightweight SQL library written over JDBC driver for Kotlin language.

Tools ^{Back ⇈}

• Kotlin Notebook - Kotlin notebooks are interactive worksheets with rich outputs.
• L-Briand/TT (⭐2) - A powerful key:value template processor.
• Vorlonsoft/EasyDokkaPlugin (⭐13) - Gradle Script plugin to generate documentation by Dokka for Kotlin and Java, Android and non-Android projects.
• cypressious/KotlinW (⭐17) - A small wrapper for the Kotlin compiler that can be used to execute .kts scripts.
• Vorlonsoft/GradleMavenPush (⭐21) - Gradle Script plugin to upload Gradle Android/Kotlin/Java Artifacts to Maven repositories (JCenter, Maven Central, ...).
• kohesive/keplin (⭐25) - Secure Kotlin scripting and binary lambda-scripts.
• mkohm/detekt-hint (⭐80) - Detection of design principle violations as a plugin to detekt.
• s1monw1/KtsRunner (⭐204) - Library for executing .kts files from regular Kotlin code using Java Scripting Engines API
• typesafegithub/github-workflows-kt (⭐519) - Authoring GitHub Actions workflows in Kotlin. You won't go back to YAML!
• saveourtool/diktat (⭐535) - Strict coding standard for Kotlin and a custom set of rules for detecting and autofixing code smells.
• Kotlin/kotlin-interactive-shell (⭐592) - Kotlin Language Interactive Shell
• SonarSource/sonarlint-intellij (⭐606) - An IDE extension that helps you detect and fix quality issues as you write code.
• facebookincubator/ktfmt (⭐911) - Kotlin code formatter that reflows lines and always produces the same result.
• Kotlin/kotlinx-kover (⭐1.4k) - Gradle plugin for Kotlin code coverage agents.
• jmfayard/refreshVersions (⭐1.7k) - Better Gradle dependencies management inside the IDE. Search for available updates.
• holgerbrandl/kscript (⭐2.1k) - Scripting utils for Kotlin.
• Kotlin/dokka (⭐3.4k) - Documentation Engine for Kotlin.
• pinterest/ktlint (⭐6.2k) - An anti-bikeshedding Kotlin linter with built-in formatter.
• detekt/detekt (⭐6.3k) - Static code analysis for Kotlin.

Compiler Plugins ^{Back ⇈}

• Mr-Mappie/mappie (⭐21) - Kotlin compiler plugin generating type-safe and performant object mapping code.
• aafanasev/sekret (⭐112) - Kotlin compiler plugin to exclude secret properties from toString() of Data class
• AhmedMourad0/no-copy (⭐156) - A Kotlin compiler plugin that performs 'copy-erasure' on data classes.
• google/ksp (⭐2.9k) - Kotlin Symbol Processing API

Continuous Integration ^{Back ⇈}

• danger/kotlin (⭐497) - Stop saying "you forgot to …" in code review in Kotlin

Code Generators ^{Back ⇈}

• jhipster/jhipster-kotlin (⭐453) - A scaffold generator to generate web apps or APIs using springboot and angularJS or React

Desktop ^{Back ⇈}

Http Clients ^{Back ⇈}

• jkcclemens/khttp - Kotlin HTTP requests library.
• corbella83/kotliny.network (⭐5) - Simple, powerful and lightweight Kotlin Multiplatform Network Client
• speekha/httpmocker (⭐178) - Kotlin library to handle offline mode easily with OkHttp.
• rybalkinsd/kohttp (⭐480) - Kotlin DSL-based HTTP client.
• kittinunf/Fuel (⭐4.6k) - The easiest HTTP networking library for Kotlin/Android.

Networking ^{Back ⇈}

• open-coap/kotlin-mbedtls (⭐9) - Integration with mbedtls library to provide DTLS client and server in jvm
• seniorjoinu/reliable-udp (⭐30) - Multiplexed, coroutine-powered reliable UDP for Kotlin using fountain codes

Editors ^{Back ⇈}

• sargunster/kotlin-textmate-bundle (⭐12) - Kotlin bundle for TextMate.
• alexmt/atom-kotlin-language (⭐26) - Adds syntax highlighting to Kotlin files in Atom
• ice1000/NppExtension (⭐74) - Kotlin Language extension for Notepad++
• vkostyukov/kotlin-sublime-package (⭐138) - A Sublime Package for Kotlin.
• ftomassetti/kanvas (⭐144) - A truly hackable editor: simple, lightweight, understandable.
• mathiasfrohlich/vscode-kotlin (⭐203) - Kotlin language support for VS Code.
• udalov/kotlin-vim (⭐632) - Kotlin Syntax Highlighter for Vim.
• fwcd/KotlinLanguageServer (⭐1.7k) - Smart code completion, diagnostics and more for Kotlin using the Language Server Protocol. VS Code extension included.
• JetBrains/intellij-community (⭐17k) - IntelliJ IDEA Community Edition

Syntax Highlighters ^{Back ⇈}

• birkenfeld/pygments-main - Python syntax highlighter.
• cansik/kotlin-latex-listing (⭐124) - A syntax highlighting template for the Kotlin language in LaTeX listings.
• jneen/rouge (⭐3.3k) - A pure-ruby code highlighter that is compatible with pygments. (wip)
• github/linguist (⭐12k) - For Ruby/Github, uses Sublime package
• isagalaev/highlight.js (⭐24k) - Javascript syntax highlighter. (out-of-date)

Game Development ^{Back ⇈}

• vassilibykov/AdventKT (⭐17) - A Kotlin-based DSL for text adventures, with a partial replica of the classic Colossal Cave as an example.
• KogeLabs/Ockero (⭐75) - Ockero: Kotlin OpenGl Game Engine
• zeganstyl/thelema-engine (⭐77) - 3d graphics engine in Kotlin, based on sources of libGDX. Platforms: JVM, TeaVM, Kotlin/JS, Kotlin/Native. See live demo: TeaVM, Kotlin/JS
• littlektframework/littlekt (⭐320) - A Kotlin multiplatform 2D game development framework based on OpenGL that is inspired by libGDX and KorGE. Current platforms: JVM, Web, and Android.
• icela/FriceEngine (⭐343) - Make game developing easy again!
• Hexworks/zircon (⭐753) - An extensible text GUI library which targets multiple platforms and designed specifically for game developers, written in Kotlin.
• libktx/ktx (⭐1.4k) - Kotlin utilities for LibGDX applications.
• korlibs/KorGE (⭐2.5k) - Modern Multiplatform Game Engine for Kotlin. Write games for the JVM, JavaScript, Android and iOS in no time using Kotlin.
• AlmasB/FXGL (⭐4.4k) - JavaFX 8 Game Library written in Java + Kotlin

Misc ^{Back ⇈}

• themichailov/kache - Kotlin functions caching library, reducing count of function executions.
• spoptchev/kotlin-preconditions - Precondition error checking in kotlin.
• spoptchev/scientist - A kotlin library for refactoring code. Port of GitHub's scientist.
• eriksencosta/math-common (⭐1) - Mathematical conventions to reduce boilerplate code
• eriksencosta/math-percentage (⭐2) - Percentage calculations made easy
• d-max/dsl-logger (⭐3) - Simple DSL for logging with logger abstraction layer
• mobiletoly/urlsome (⭐4) - URL builder library for Kotlin
• jillesvangurp/querylight (⭐5) - In memory search engine for simple in app search. Implements tf/idf and a some basic queries, tokenizers and analyzers.
• JoelW-S/groothy (⭐8) - Kotlin implementation of Groovy Truth.
• sandjelkovic/kxjtime (⭐8) - Lightweight Kotlin extensions for java.time API
• vendelieu/re.this - Kotlin Multiplatform Redis Client: coroutine-based, DSL-powered, and easy to use.
• Ahoo-Wang/CoCache (⭐8) - Level 2 Distributed Coherence Cache Framework
• InsanusMokrassar/KSLog (⭐10) - Fully customizable and lightweight logging library for Kotlin
• pearxteam/kpastebin (⭐10) - Multiplatform Kotlin library to interact with the pastebin.com API
• DragonKnightOfBreeze/breeze-framework (⭐11) - Integrated code framework base on Kotlin, provide many useful extensions for standard library and some frameworks.
• Lewik/klog (⭐11) - Minimalistic and multiplatform logging for Kotlin
• RationalityFrontline/kevent (⭐13) - A powerful in-process event dispatcher based on Kotlin and Coroutines.
• nickhristov/krakdown (⭐14) - A native markdown parser written in Kotlin.
• ssuukk/Qotlin (⭐16) - IBM Q Experience Kotlin toolkit - Kotlin library to interact and write assembly code for IBM Quantum computers
• dotCipher/kase-format (⭐17) - String case conversion and detection library
• Ahoo-Wang/Simba (⭐17) - Distributed lock service
• saschpe/log4k (⭐18) - Lightweight logging library for Kotlin/Multiplatform. Supports Android, iOS, JavaScript and plain JVM environments.
• mplatvoet/progress (⭐20) - Progress for Kotlin.
• DavidMellul/Kotlin-Publish-Subscribe (⭐21) - Intuitive and powerful human-readable Kotlin DSL for IPCs & turning anything into a message receiver / broadcaster
• fluidsonic/fluid-pdf (⭐22) - Easy PDF generation with HTML & CSS using Chromium or Google Chrome
• sargunster/KtUnits (⭐23) - Tiny unit conversion library for Kotlin.
• lpicanco/krate - Krate is a rate limiter library designed specifically for Kotlin applications. In memory, Redis and Caffeine support.
• vittee/kformula (⭐29) - Mathematical expression engine written in Kotlin, running on JVM.
• MiloszKrajewski/stateful4k (⭐33) - State Machine Construction Kit for Kotlin
• jershell/kbson (⭐41) - Bson support for kotlinx.serialization
• czyzby/kotlin-times (⭐43) - A simple utility library for readable loops.
• evoasm/kasm (⭐43) - x64/x86-64 assembler and execution library
• cesarferreira/kotlin-pluralizer (⭐50) - Kotlin extension to pluralize and singularize strings.
• seljabali/java-time-fun (⭐59) - java.time Kotlin extension functions library.
• Rasalexman/KDispatcher (⭐66) - Simple and light-weight event dispatcher for Kotlin
• aminography/PrimeCalendar (⭐66) - Provides all of the java.util.Calendar functionalities for Civil, Persian, Hijri, Japanese, etc, as well as their conversion to each other.
• Jire/Strukt (⭐74) - Value types on the JVM, today!
• s1monw1/TLSLibrary (⭐76) - Simple TlsLibrary written in Kotlin - Provides DSL for creating TLS connections
• ziggy42/kolor (⭐78) - A library to print colored strings, with Kotlin.
• debop/koda-time (⭐82) - Joda Time Extensions in Kotlin. (From Java 8 use java.time instead)
• vjames19/kotlin-futures (⭐83) - A collections of extension functions to make the JVM Future, CompletableFuture, ListenableFuture API more functional and Kotlin like.
• justwrote/kjob (⭐84) - A coroutine based persistent background scheduler written in Kotlin.
• pearxteam/kasechange (⭐90) - Multiplatform Kotlin library to convert strings between various case formats including Camel Case, Snake Case, Pascal Case and Kebab Case
• kunalsheth/units-of-measure (⭐93) - A type-safe dimensional analysis library for Kotlin.
• z4kn4fein/kotlin-semver (⭐95) - Semantic Versioning library for Kotlin Multiplatform.
• kohesive/solr-undertow (⭐96) - Solr Standalone Tiny and High performant server.
• KotlinNLP/SimpleDNN (⭐98) - SimpleDNN is a machine learning lightweight open-source library part of KotlinNLP and has been designed to support relevant neural network architectures in natural language processing tasks.
• ivanisidrowu/KtRssReader (⭐99) - Kotlin library for parsing RSS feeds
• consoleau/kassava (⭐115) - This library provides some useful kotlin extension functions for implementing toString() and equals() without all of the boilerplate.
• KotUniL (⭐117) - KotUniL: Kotlin function and objects for working with SI units like meter, second, as well as currencies and general units like percent.
• leprosus/kotlin-hashids (⭐119) - Library that generates short, unique, non-sequential hashes from numbers.
• TicketmasterMobileStudio/actions-on-google-kotlin (⭐119) - Port of official Node.js SDK to Kotlin. Complete with all features and tests and nearly identical API.
• jillesvangurp/geogeometry (⭐126) - GeoGeometry is a set of algorithms and functions for manipulating geo hashes and geometric shapes with geo coordinates
• kohesive/klutter (⭐140) - A mix of random small libraries for Kotlin, the smallest reside here until big enough for their own repository.
• Kotlin/kotlinx.reflect.lite (⭐158) - Lightweight library allowing to introspect basic stuff about Kotlin symbols.
• eriksencosta/money (⭐163) - Monetary calculations and allocations made easy
• MehdiK/Humanizer.jvm (⭐167) - Humanizer.jvm meets all your jvm needs for manipulating and displaying strings, enums, dates, times, timespans, numbers and quantities.
• holgerbrandl/kravis (⭐183) - A Kotlin grammar for scientific data visualization
• vendelieu/telegram-bot (⭐185) - A lightweight, feature-rich wrapper for the Telegram Bot API
• krud-dev/shapeshift (⭐189) - A Kotlin library for intelligent object mapping and conversion between objects.
• fork-handles/tuples4k (⭐221) - Tuple classes
• just-ai/jaicf-kotlin (⭐241) - Kotlin framework for conversational voice assistants and chatbots development.
• yole/kxdate (⭐258) - Kotlin extensions for Java 8 java.time API
• oolong-kt/oolong - Elm inspired Model-View-Update (MVU) implementation for Kotlin multiplatform.
• hotchemi/khronos (⭐327) - An intuitive Date extensions in Kotlin.
• insanusmokrassar/TelegramBotAPI (⭐358) - Kotlin Multiplatform library for type-safe work with Telegram Bot API
• touchlab/KMMBridge (⭐362) - KMMBridge is a set of Gradle tooling that facilitates publishing and consuming pre-built KMM (Kotlin Multiplatform Mobile) Xcode Framework binaries.
• nsk90/kstatemachine (⭐366) - KStateMachine is a Kotlin DSL library for creating state machines and statecharts.
• charleskorn/kaml (⭐517) - YAML support for kotlinx.serialization
• cretz/asmble (⭐634) - Compile WebAssembly to JVM and other WASM tools.
• doyaaaaaken/kotlin-csv (⭐646) - A pure kotlin simple csv reader/writer.
• mplatvoet/kovenant (⭐653) - Promises for Kotlin and Android
• pmwmedia/tinylog (⭐698) - Lightweight logging framework with native logging API for Kotlin.
• pemistahl/lingua (⭐703) - A language detection library suitable for long and short text alike
• kotlin-telegram-bot/kotlin-telegram-bot (⭐834) - A wrapper for the Telegram Bot API written in Kotlin.
• Kotlin/kotlinx.atomicfu (⭐917) - The idiomatic way to use atomic operations in Kotlin.
• Kotlin/kotlinx-datetime (⭐2.4k) - A multiplatform Kotlin library for working with date and time.
• MicroUtils/kotlin-logging (⭐2.6k) - Lightweight logging framework for Kotlin. Used as a wrapper for slf4j with Kotlin extensions.
• ingokegel/jclasslib (⭐2.8k) - jclasslib bytecode viewer is a tool that visualizes all aspects of compiled Java class files and the contained bytecode.
• puniverse/quasar (⭐4.6k) - Fibers, Channels and Actors for the JVM.

Parsers ^{Back ⇈}

• asm0dey/staks (⭐13) - Extensible XML parser DSL, based on StAX
• ParserKt/ParserKt (⭐14) - Naive one-pass recursive descent, scannerless parser framework for Kotlin
• sargunster/CakeParse (⭐25) - Simple parser combinator library for Kotlin.
• fork-handles/parser4k (⭐221) - Recursive descent parser combinator library
• fleeksoft/ksoup (⭐286) - Kotlin Multiplatform library for working with HTML and XML. It's a port of the renowned Java library Jsoup.
• h0tk3y/better-parse (⭐421) - A nice parser combinator library for Kotlin

Raspberry Pi ^{Back ⇈}

• Pi4J/pi4j-kotlin (⭐47) - Pi4J Kotlin DSL and API.

Multiplatform ^{Back ⇈}

• DetachHead/kotlinxpath (⭐4) - A typesafe builder for Xpath with several useful helper functions that make Xpath easier to work with
• Ashampoo/xmpcore (⭐16) - Kotlin Multiplatform port of Adobe's XMP SDK
• L-Briand/KTM (⭐18) - Mustache templating in kotlin multiplatform
• divyanshupundir/mavlink-kotlin (⭐48) - A modern MAVLink library for Kotlin Multiplatform.
• petertrr/kotlin-multiplatform-diff (⭐84) - Multiplatform kotlin library for calculating text differences. Based on java-diff-utils.
• ctripcorp/mmkv-kotlin (⭐132) - The Kotlin Multiplatform wrapper for MMKV
• nacular/measured (⭐157) - Type-safe, intuitive units of measure
• Ashampoo/kim (⭐172) - Kotlin Multiplatform library for reading and writing image metadata
• davidepianca98/KMQTT (⭐187) - MQTT Broker library/executables for Kotlin multiplatform.
• respawn-app/FlowMVI (⭐307) - A Kotlin Multiplatform architectural framework based on coroutines with an extensive feature set, powerful plugin system and a rich DSL.
• ionspin/kotlin-multiplatform-bignum (⭐366) - Pure kotlin multiplatform arbitrary precision arithmetic library.
• GitLiveApp/firebase-kotlin-sdk (⭐1.1k) - A Kotlin-first Multiplatform SDK for Firebase supporting iOS, Android & Web

Cryptography ^{Back ⇈}

• appmattus/crypto (⭐90) - A collection of Kotlin Multiplatform Mobile cryptographic hashing functions.
• ionspin/kotlin-multiplatform-libsodium (⭐99) - Kotlin multiplatform wrapper for Libsodium cryptographic library.

DSL ^{Back ⇈}

• bipokot/Kabu (⭐33) - The fastest way to create complex Kotlin DSL
• h0tk3y/regex-dsl (⭐86) - A Kotlin DSL for regular expressions

Extensions ^{Back ⇈}

• hankdavidson/ktime (⭐26) - Extensions to the java8 time library
• LukasForst/katlib (⭐82) - A collection of Kotlin extension functions and utilities.
• vanshg/KrazyKotlin (⭐86) - A collection of useful Kotlin Extension

Configuration ^{Back ⇈}

• daviddenton/configur8 (⭐12) - A Kotlin port of Configur8 - A Type Safe Configuration API for Kotlin, extendable to user-defined types.
• Nohus/AutoKonfig - A Kotlin configuration library with batteries included. Type-safe, zero lines of setup.
• davidohana/kofiko-kotlin (⭐22) - Kofiko: Code-First configuration library. Lightweight, simple and minimal boilerplate.
• ufoscout/properlty (⭐26) - Simple configuration library with placeholders resolution and zero magic!
• mariomac/kaconf (⭐60) - KickAss Configuration. An annotation-based configuration system for Java and Kotlin
• jdiazcano/cfg4k (⭐80) - Flexible and easy to use config library written in kotlin.
• npryce/konfig (⭐280) - A Type Safe Configuration API for Kotlin
• config4k/config4k (⭐279) - A Kotlin wrapper for Typesafe Config
• uchuhimo/konf (⭐309) - A type-safe cascading configuration library for Kotlin/Java, supporting most configuration formats
• cdimascio/dotenv-kotlin (⭐506) - A zero-dependency module that loads environment variables from a .env file
• sksamuel/hoplite (⭐921) - A library for loading configuration files into typesafe Kotlin data classes in a boilerplate-free way

Graphics ^{Back ⇈}

• GlimpseFramework/glimpse-framework (⭐16) - OpenGL made simple.
• java-opengl-labs/modern-jogl-examples (⭐110) - port of 'Learning Modern 3D Graphic Programming' by J.L.McKesson (jogl)
• java-opengl-labs/learn-OpenGL (⭐38) - port of https://learnopengl.com/ tutorial (lwjgl)
• java-opengl-labs/Vulkan (⭐50) - port of https://github.com/SaschaWillems/Vulkan (⭐10k)
• Jonatino/JOGL2D (⭐28) - Zero-overhead 2D rendering library for JOGL using Kotlin.
• soywiz/kaifu2x (⭐32) - Waifu2x port to Kotlin as library and CLI. Convolutional-neural-network based upscaler for Anime-like images and noise/artifact reduction.
• nwillc/ksvg (⭐81) - Kotlin SVG image generation DSL, supporting inline and file formats.
• openrndr/openrndr (⭐880) - OPENRNDR, a framework for creative coding in Kotlin. Accelerated 2D and 3D graphics, vector graphics, shaders and animation
• openrndr/orx (⭐122) - ORX is a collection extras for OPENRNDR which add support for sensors, live-coding, user interfaces and much more.
• markaren/three.kt (⭐207) - Kotlin port of three.js JavaScript 3D library
• JetBrains/skiko (⭐1.8k) - Kotlin Multiplatform bindings to Skia
• kotlin-graphics/ovr (⭐6) - Oculus binding
• kotlin-graphics/uno-sdk (⭐24) - Unofficial OpenGL SDK
• kotlin-graphics/gli (⭐31) - g-truck gli port, image library
• kotlin-graphics/openvr (⭐37) - OpenVR binding
• dananas/kotlin-glsl (⭐43) - Write your GLSL shaders in Kotlin
• kotlin-graphics/bullet (⭐43) - bullet port
• kotlin-graphics/kotlin-unsigned (⭐74) - Unsigned operators and boxed types (Ubyte, Uint, Ulong and Ushort) for unsigned support.
• kotlin-graphics/assimp (⭐94) - Open Asset Import Library port
• kotlin-graphics/glm (⭐128) - g-truck glm port, opengl mathematics library
• data2viz/data2viz (⭐414) - multiplatform dataviz library, d3js port
• kotlin-graphics/imgui (⭐601) - jvm port of imgui

Data Science ^{Back ⇈}

• Kotlin for Data Science - Kotlin for Data Science overview page
• Kotlin/dataframe (⭐831) - A Kotlin library for in-memory data manipulation
• Kotlin/kandy (⭐588) - Kotlin plotting library
• JetBrains/lets-plot-kotlin (⭐433) - Grammar of graphics visualization for Kotlin
• Kotlin/KotlinDL (⭐1.5k) - High-level Deep Learning Framework written in Kotlin and inspired by Keras.
• Kotlin/kotlin-jupyter (⭐1.1k) - Official Kotlin Jupyter kernel
• kyonifer/koma (⭐270) - A scientific computing library for Kotlin.
• mipt-npm/kmath (⭐656) - A (not so numpy-like) multiplatform mathematical library with higher level abstractions.
• unipu-ict/ksdtoolkit (⭐3) - Kotlin System Dynamics Toolkit - for system dynamics modelling and simulation with Kotlin.
• MarcinMoskala/KotlinDiscreteMathToolkit (⭐184) - Set of extensions for Kotlin that provides Discrete Math functionalities as an Kotlin extension functions.
• sekwiatkowski/Komputation (⭐293) - A neural network framework written in Kotlin.
• sanity/pairAdjacentViolators (⭐49) - A Kotlin implementation of the Pair Adjacent Violators algorithm for isotonic regression.
• breandan/kotlingrad (⭐527) - Shape-Safe Differentiable Programming with Algebraic Data Types.
• kiegroup/optaplanner - Constraint solving AI for planning and scheduling problems.
• timefoldai/timefold-solver - AI solver to optimize scheduling of vehicle routes, employees, maintenance, jobs, etc.
• holgerbrandl/kalasim - Discrete event simulator that enables complex, dynamic process models.
• cdietze/euklid (⭐2)
• lamba92/KGraph (⭐19) - A Kotlin multi-platform library for graph data structures
• Kotlin/multik (⭐642) - A Kotlin library for working with multi-dimensional arrays
• breandan/kaliningraph (⭐117)
• grinisrit/noa-atra (⭐26) - Analytics for Trading with NOA
• sigbla/sigbla-app (⭐21) - Sigbla is a framework for working with data in tables, supporting various data types, reactive programming and events, user input, charts, and more

Command Line Interface ^{Back ⇈}

• ajalt/clikt (⭐2.5k) - Clikt - Intuitive command line interface parsing for Kotlin.
• leprosus/kotlin-cli (⭐38) - Kotlin-CLI - command line interface options parser for Kotlin.
• jimschubert/kopper (⭐39) - A simple Kotlin option parser
• xenomachina/kotlin-argparser (⭐482) - Easy to use and concise yet powerful and robust command line argument parsing for Kotlin.
• ajalt/mordant (⭐983) - Mordant - Full-featured text styling for Kotlin command line applications.
• aPureBase/arkenv (⭐17) - Fully fledged command line arguments / environment variables parser via simple Kotlin delegates
• fork-handles/bunting4k (⭐221) - Simple, typesafe, testable command line flags
• dbaelz/Konclik (⭐45)
• varabyte/kotter (⭐570) - A declarative, Kotlin-idiomatic API for writing dynamic command line applications
• kotlin-inquirer (⭐216) - A collection of common interactive command line user interfaces written in Kotlin

Browsers ^{Back ⇈}

• wendigo/chrome-reactive-kotlin (⭐75)

I/O ^{Back ⇈}

• square/okio - A modern I/O library for Android, Kotlin, and Java.
• rsocket/rsocket-kotlin - Kotlin implementation of RSocket.
• lepicekmichal/SignalRKore (⭐25) - Kotlin multiplatform implementation of SignalR.
• Dynamium/EVCalc - EVCalc is a calculation engine for mobile electric venicles (Electric scooters, electric unicycles, and so on) written in Kotlin.
• agcom/knio2 (⭐3) - Kotlinx coroutines extensions for Java NIO.2

API Clients ^{Back ⇈}

• jillesvangurp/kt-search (⭐107) - Kotlin multiplatform library for Elasticsearch and Opensearch
• formation-res/overpass-kotlin-client (⭐1) - A simple client for overpass that uses ktor-client and kotlinx.serialization for parsing JSON responses.
• JetBrains/space-kotlin-sdk (⭐46) - Kotlin client for JetBrains Space HTTP API
• adamint/spotify-web-api-kotlin (⭐197) - Spotify Web API wrapper for Kotlin/Android, JVM, JS, and Native targets.
• awslabs/aws-sdk-kotlin (⭐407) - Multiplatform AWS SDK for Kotlin
• MoviebaseApp/tmdb-api (⭐206) - Modern powerful TMDB API to fetch movies and TV shows for Kotlin Multiplatform.
• MoviebaseApp/trakt-api (⭐46) - Modern powerful Trakt API to track, discover and share your movies & TV shows.
• InsanusMokrassar/ktgbotapi (⭐358) - Strongly typed API wrapper for Telegram Bots API

Internationalisation and Localization ^{Back ⇈}

• cashapp/barber (⭐166) - A type safe Kotlin JVM library for building up localized, fillable, themed documents using Mustache templating.
• projectfluent/fluent-kotlin (⭐29) - Kotlin tooling implementation of ProjectFluent. Read, write, and transform Fluent files.
• formation-res/fluent-kotlin (⭐10) - Kotlin multi platdform localization for js and jvm based on project fluent.

Logging ^{Back ⇈}

• LighthouseGames/KmLogging (⭐85) - Kotlin multiplatform logging. High performance, composable and simple to use.
• Foso/Cabret-Log (⭐195) - Method call logging for Kotlin Multiplatform
• InsanusMokrassar/KSLog (⭐10) - Simple Kotlin Logging

Mail ^{Back ⇈}

• bluefireoly/SimpleKotlinMail (⭐66) - A simple, modern and coroutine based Kotlin Email API, supporting both clientside and serverside projects.

Jetpack-Compose ^{Back ⇈}

• CuriousNikhil/neumorphic-compose (⭐391) - Neumorphism UI on Android with Jetpack Compose. Just add one modifier = Modifier.neumorphic()
• CuriousNikhil/compose-particle-system (⭐75) - A lightweight particle system for Jetpack Compose - Quarks
• CuriousNikhil/k5-compose (⭐214) - K5-compose is a sketchy port of p5.js for Jetpack Compose Desktop
• Canopas/Intro-showcase-view (⭐478) - An android library to highlight different features of the app built using Jetpack Compose.
• mahozad/wavy-slider (⭐163) - Multiplatform UI widget that recreates the Android 13 squiggly progress bar

Projects ^{Back ⇈}

Web ^{Back ⇈}

• jillesvangurp/rankquest-studio (⭐7) - Rankquest Studio is a web based tool that you can use to benchmark search query metrics for your search APIs. Written in Kotlin & Fritz2
• sdeleuze/spring-boot-kotlin-demo (⭐616) - Basic Spring Boot app in Kotlin.
• IRus/kotlin-dev-proxy (⭐22) - Simple server for proxy requests and host static files written in Kotlin, Spark Java and Apache HttpClient.
• ratpack/example-ratpack-gradle-kotlin-app (⭐37) - An example of a Kotlin Ratpack app built with Gradle.
• mariomac/codebuilder (⭐6) - Demo app about asynchronous architectures for long-response-time web applications.
• cbedoy/DYUM (⭐2) - Basic Kotlin Implementation following MVP, and using Third Party library by Natural Analytics Language
• eddywm/KTFLITE (⭐177) - Computer Vision on Android with Kotlin and Tensorflow Lite.
• rocketraman/kotlin-web-hello-world (⭐8) - This project shows how to do a web-based "Hello World!" with Kotlin in combination with various JVM - based web frameworks.
• FirstArtaxer/karbitrage (⭐0) - Kotlin-based project designed to extract cryptocurrency prices from various exchanges using the Ktor framework.
• ivanpopelyshev/vertx-facebook-messenger (⭐8) - Seed project for facebook messenger bots. Vertx, Kotlin.
• corda/corda (⭐4k) - Corda is a distributed ledger platform designed to record, manage and automate legal agreements between business partners.
• spolnik/JAlgoArena (⭐36) - JAlgoArena is a highly scalable programming contest platform which you can host on own infrastructure. It allows to define new problems and solve them in Kotlin and Java.
• mixitconf/mixit (⭐539) - MiXiT website
• derveloper/kiny - Your super simple private serverless service running your kotlin functions like AWS lambda.
• ssouris/petclinic-spring5-reactive (⭐53) - Spring 5 Reactive Petclinic app written in Kotlin.
• yyunikov/spring-boot-2-kotlin-starter (⭐17) - Spring Boot 2.0 Kotlin application starter with configurations for Gradle, Mongo, JUnit 5 tests, logging, CircleCI and Docker compose.
• viniciusccarvalho/kodein-cloud-functions (⭐3) - Provides adapters to different cloud functions providers (AWS, Azure) to run vanilla kotlin functions defined as kodein modules
• MichaelGrigoryan25/kotlin-url-shortener - Basic URL shortener built with Kotlin, Redis and Javalin
• Ahoo-Wang/CoSky (⭐80) - High-performance, low-cost microservice governance platform. Service Discovery and Configuration Service

Build tools ^{Back ⇈}

• cbeust/kobalt (⭐432) - Build system inspired by Gradle.
• gradle/kotlin-dsl-samples (⭐3.7k) - Kotlin language support for Gradle build scripts.
• nebula-plugins/nebula-kotlin-plugin (⭐57) - Provides the Kotlin plugin via the Gradle plugin portal, automatically depends on the standard library, and allows Kotlin library versions to be omitted.
• pubref/rules_kotlin (⭐159) - Bazel rules for Kotlin.

Misc ^{Back ⇈}

• quicktype/quicktype (⭐12k) - Generate Kotlin types and converters from JSON, Schema, TypeScript, and GraphQL
• lice-lang/lice (⭐130) - A Lisp-like language's interpreter written in Kotlin
• sureshg/InstallCerts (⭐15) - Create a PKCS12 TrustStore by retrieving server certificates.
• vicboma1/GameBoyEmulatorEnvironment (⭐20) - Front-End developed with Kotlin Experimental for my GameBoy Emulator (coroutines).
• borisf/classyshark-bytecode-viewer (⭐202) - View your Kotlin generated classes as Java and bytecode format.
• jenkinsci/doktor-plugin (⭐22) - Jenkins plugin for automated documentation uploading to Confluence.
• mkobit/jenkins-pipeline-shared-libraries-gradle-plugin (⭐148) - Gradle plugin to help with build and test of Jenkins Pipeline Shared Libraries.
• kpspemu/kpspemu (⭐72) - Multiplatform (JS and JVM) PSP Emulator written in Kotlin.
• sourcerer-io/sourcerer-app (⭐6.7k) - Visual profile for software engineers written in Kotlin.
• chrislo27/RhythmHeavenRemixEditor (⭐434) - An audio custom remix editor designed for the Rhythm Heaven series, using libGDX and Kotlin.
• Poweranimal/PowerCollections (⭐16) - Powerfull Collections, Sets, Lists and Maps.
• neworld/gradle-jdeploy-plugin (⭐2) - Gradle plugin to publish JVM applications via npmjs.com
• ruslanys/telegraff (⭐146) - Kotlin DSL for Telegram Bots creation.
• krzema12/fsynth (⭐11) - Music synthesizer as a Kotlin multiplatform project
• AngryJKirk/familybot (⭐121) - Telegram bot to have some fun with your buddies
• madhead/tyzenhaus (⭐13) - Shared expenses tracking Telegram bot

Desktop ^{Back ⇈}

• ice1000/Dekoder (⭐21) - A kotlin music player, materially designed.
• ice1000/dev-kt (⭐94) - DevC++-like cross-platform Kotlin IDE.
• ruslanys/vkmusic (⭐36) - JavaFX and Spring-Boot based application for grabbing music from VK.com.
• datalisk/datalisk - A file sync and storage application with end-to-end encryption and multi-platform support.
• yschimke/okurl (⭐123) - cURL-like client based on OkHttp.
• hazae41/Kotlin-Compiler-GUI (⭐1) - Easily compile Kotlin classes (.kt) and run Kotlin scripts (.kts)
• pintowar/sudoscan (⭐7) - Scans and solves Sudoku Puzzles from images using AI
• russellbanks/HashHash (⭐34) - A Multiplatform GUI for Hashing, written in Compose for Desktop.
• krud-dev/ostara (⭐319) - A desktop application that provides various features to monitor and interact with Spring Boot Applications via Actuator.

Examples ^{Back ⇈}

• Kotlin/kotlin-koans (⭐2.6k) - Kotlin Koans are a series of exercises to get you familiar with the Kotlin Syntax.
• JetBrains/kotlin-examples (⭐3.2k) - Various examples for Kotlin.
• JetBrains/swot (⭐1.7k) - Identify email addresses or domains names that belong to colleges or universities. Help automate the process of approving or rejecting academic discounts.
• robfletcher/midcentury-ipsum (⭐3) - Swingin’ filler text for your jet-age web page.
• som-one/zarif-kherkin (⭐8) - Configurable BDD testing using a Kotlin DSL for Gherkin.
• robfletcher/lazybones-kotlin (⭐1) - The Lazybones app migrated to Kotlin as a learning exercise.
• wangjiegulu/KotlinAndroidSample (⭐27) - Android sample with kotlin.
• dodyg/Kotlin101 (⭐193) - 101 examples for Kotlin Programming language.
• dkandalov/kotlin-99 (⭐651) - Solve 99 problems with Kotlin!
• dkandalov/rosettacode-kotlin (⭐21) - Repository with source code from RosettaCode
• vicboma1/Kotlin-Koans (⭐124) - hese are the simple solutions of the kotlin koans online with intellij project.
• vicboma1/GettingStartedKotlin (⭐43) - Learn the basics of getting started with kotlin.
• vicboma1/Kotlin-Examples-Problems (⭐25) - These are the simple solutions of the kotlin example problems online.
• pakoito/FunctionalAndroidReference (⭐275) - A different Android app showcasing Functional Reactive Programming.
• bmaslakov/kotlin-algorithm-club (⭐931) - Classic algorithms and data structures in Kotlin.
• gyulavoros/kotlin-todomvc (⭐22) - Kotlin TodoMVC – full-stack Kotlin application demo
• mkraynov/todomvc-react-kotlin (⭐10) - React Kotlin TodoMVC – example based on create-react-kotlin-app and todomvc-react
• IvanMwiruki/30-seconds-of-kotlin (⭐250) - Useful Kotlin snippets you can understand quickly, using only the stdlib.
• xurxodev/integration-testing-kotlin-multiplatform-kata (⭐28) - A full exercise to learn how to use stubbing HTTP in Kotlin multiplatform using Ktor and Ktor Client Mock.
• TobseF/Candy-Crush-Clone (⭐134) - A Kotlin Multiplatform match 3 sample game build to teach, made with KorGE.
• mrcsxsiq/Kotlin-Pokedex (⭐1.5k) - A Pokedex demo app built with Kotlin using ViewModel, LiveData, Room and Navigation
• LukasLechnerDev/Kotlin-Coroutine-Use-Cases-on-Android (⭐2.7k) - Learn Kotlin Coroutines for Android by example. Sample implementations for real-world Android use cases. Unit tests included.
• rozkminiacz/KotlinUnitTesting (⭐115) - Kotlin Unit Testing Examples.
• itmaginationdemos/KMM-Sample-App (⭐5) - A sample app written with the help of KMM (Kotlin Multiplatform). File System access, voice recording, and persistence.
• formation-res/kt-fullstack-demo (⭐2) - This demo kotlin-js project implements a UI and server for a little recipe search engine to demonstrate fritz2, kotlin-js, localization with mozilla fluent, use of koin in a webapp.

Idea Plugins ^{Back ⇈}

• Vektah/CodeGlance (⭐1.1k) - Intelij IDEA plugin for displaying a code mini-map similar to the one found in Sublime.
• intellij-rust/intellij-rust (⭐4.5k) - Rust IDE built using the IntelliJ Platform.
• dkandalov/activity-tracker (⭐68) - Plugin for IntelliJ IDEs to track and record user activity.
• dkandalov/limited-wip (⭐109) - Plugin to limit your work-in-progress.
• dkandalov/pomodoro-tm (⭐138) - Pomodoro timer.
• izhangzhihao/intellij-rainbow-brackets (⭐4.5k) - Rainbow Brackets / Rainbow Parentheses for IntelliJ IDEA based IDEs.
• roger-yh99/Readhub (⭐62) - Readhub is a News Reader plugin for IntelliJ IDEs
• roger-yh99/AwesomeKotlinPlugin (⭐12) - AwesomeKotlin plugin for IntelliJ IDEs
• emedinaa/kotlin-mvvm (⭐533) - MVVM(Model View ViewModel) sample in Kotlin using the components ViewModel, LiveData and Retrofit library
• emedinaa/kotlin-mvp-volley (⭐9) - Example of Android project in Kotlin using MVP(Model View Presenter) pattern and volley library
• emedinaa/android-recyclerview (⭐2) - Some samples about the RecyclerView and Adapters using kotlin
• emedinaa/kotlin-viewmodel (⭐3) - Basic samples about ViewModel component
• wuseal/JsonToKotlinClass (⭐3.1k) - Plugin for IntelliJ IDEs to generate Kotlin data class code from JSON text
• csense-oss/idea-kotlin-checked-exceptions (⭐24) - Plugin to help integrate with java and exceptions (highlights, warns when not catching exceptions and a lot more)

Playground ^{Back ⇈}

• LouisCAD/kotlin-libraries-playground (⭐180)

Android ^{Back ⇈}

• skydoves/themovies (⭐496) - A simple project for The Movie DB based on Kotlin MVVM clean architecture and material design & animations.
• skydoves/githubfollows (⭐294) - A demo project based on MVVM architecture and material design & animations.
• enricocid/Music-Player-GO - Simple yet fully-featured local music player aiming at simplicity and performance.
• deva666/NewsReader (⭐23) - Android app for reading news
• TonnyL/Mango (⭐655) - An Android app for dribbble.com
• SimonSchubert/LinuxCommandBibliotheca (⭐839) - Android app which provides a bunch of useful Linux commands.
• SimonSchubert/NewsOut (⭐117) - Android and iOS mobile client for Nextcloud News app
• pranayairan/CoinBit (⭐60) - CoinBit is completely free Bitcoin & cryptocurrency portfolio tracker app. It helps you over 4000+ cryptocurrencies on 150+ platforms including Binance, GDAX, Kraken etc
• [MohsinAli0899/Book Summary App](https://github.com/MohsinAli0899/Book Summary App) - BookHub is an Android application that helps users to view books and add them to favorites.
• zt64/Hyperion (⭐649) - An alternative YouTube front-end using modern Android architecture and Material 3

Android ^{Back ⇈}

Libraries ^{Back ⇈}

• JakeWharton/kotterknife (⭐2.2k)
• MarcinMoskala/ActivityStarter (⭐431)
• MarcinMoskala/KotlinPreferences (⭐51)
• MarcinMoskala/PreferenceHolder (⭐155)
• nsk-mironov/kotlin-jetpack (⭐183)
• pawegio/KAndroid (⭐896)
• chibatching/Kotpref (⭐697)
• TouK/bubble (⭐99)
• ragunathjawahar/kaffeine (⭐154)
• mcxiaoke/kotlin-koi (⭐516)
• PicsArt/stateful (⭐67)
• BennyWang/KBinding (⭐408)
• inaka/KillerTask (⭐26)
• grandstaish/paperparcel (⭐500) - Boilerplate reduction library written specifically for working with Kotlin data classes on Android.
• andre-artus/AnvilKotlin (⭐16) - Minimal UI library for Android inspired by React.
• mathcamp/fiberglass (⭐25) - Easy lightweight SharedPreferences library for Android in Kotlin using delegated properties.
• nitrico/LastAdapter (⭐776) - Don't write a RecyclerView adapter again. Not even a ViewHolder!.
• denisidoro/krouter (⭐121) - A lightweight Android activity router.
• metalabdesign/AsyncAwait (⭐408) - async/await for Android built upon coroutines introduced in Kotlin 1.1.
• jupf/staticlog (⭐28) - StaticLog - super lightweight static logging for Kotlin, Java and Android.
• zserge/anvil (⭐1.4k) - Minimal UI library for Android inspired by React.
• robinchew/mvil (⭐7) - 'Virtual DOM' for Android inspired by Anvil.
• DanielMartinus/Stepper-Touch (⭐685) - Fun playful Android stepper widget for counting, written in Kotlin.
• GlimpseFramework/glimpse-framework-android (⭐5) - OpenGL made simple.
• infotech-group/android-drawable-dsl (⭐180) - DSL for constructing the drawables in Kotlin instead of in XML.
• zsmb13/MaterialDrawerKt (⭐518) - A DSL for creating Material Design navigation drawers without any XML.
• SnowdreamFramework/ToyBricks (⭐33) - Android Library that provide simpler way to achieve modularity.
• DanielMartinus/Konfetti (⭐3.2k) - Lightweight particle system to create realistic confetti
• rahulchowdhury/Mystique (⭐47) - A generalized adapter for RecyclerView on Android which makes it easy to add heterogeneous items to a list.
• calintat/alps (⭐4) - Android library for preferences which includes property delegates and a custom DSL for definining preferences.
• costular/kotlin-android-utils (⭐48) - Android utilities for easier and faster Kotlin programming.
• rakshakhegde/ObservableFlow (⭐27) - Functional Constructs for Databinding + Kotlin + RxJava
• programmerr47/ganalytics (⭐11) - A tiny api layer for any analytics in application.
• line/clay (⭐121) - Clay is an Android library project that provides image trimming which is originally an UI component of LINE Creators Studio.
• WindSekirun/RichUtilsKt (⭐172) - Advancement Utils for Android Developer written in Kotlin.
• TradeMe/MapMe (⭐841) - A library that brings the adapter pattern and DiffUtil to Google Maps and MapBox.
• iglaweb/Ferris-Wheel (⭐322) - Simple android library to present an animated ferris wheel
• ehsunshine/colored-time-selector (⭐152) - A smart colored time selector. Users can select just free time with a handy colorful range selector.
• yundom/kache (⭐24) - A lightweight cache library written in Kotlin.
• adrielcafe/KBus (⭐46) - Dead simple EventBus for Android made with Kotlin and RxJava 2
• Jintin/MixAdapter (⭐19) - Compose multiple Adapter for RecyclerView in Android.
• yundom/RxVan (⭐3) - A lightweight event bus written in Kotlin and RxJava.
• duanhong169/DrawableToolbox (⭐1.1k) - The missing drawable toolbox for Android.
• adrielcafe/AndroidCoroutineScopes (⭐17) - This lib implements the most common CoroutineScopes used in Android apps.
• WindSekirun/RxSocialLogin (⭐126) - This Android library is a library that provides social login for 15 platforms powered by RxJava2, Kotlin and Firebase Authentication.
• bakhtiyork/gradients (⭐51) - A curated collection of splendid gradients
• hpost/rx-brainwaves (⭐5) - RxJava wrapper for NeuroSky MindWave headsets
• adrielcafe/KrumbsView (⭐186) - The ultimate breadcrumbs view for Android!
• inshiro/Skate (⭐9) - A simple and easy to use Android fragment stack controller
• cortinico/slidetoact (⭐1.2k) - A simple 'Slide to Unlock' Material widget for Android, written in Kotlin
• AppIntro/AppIntro (⭐11k) - Make a cool/material intro for you Android App - Now all in Kotlin!
• CuriousNikhil/gossip (⭐14) - Android TextToSpeech Helper to speak any text you want and handle events.
• adrielcafe/PufferDB (⭐100) - An Android & JVM key-value storage powered by Protobuf and Coroutines.
• adrielcafe/HAL (⭐79) - A non-deterministic finite-state machine for Android & JVM that won't let you down.
• coil-kt/coil (⭐11k) - Image loading for Android backed by Kotlin Coroutines.
• levibostian/Shutter-Android (⭐56) - an Android library to take photos, record videos, pick images/videos from gallery, with ease. Written in Kotlin.
• skydoves/balloon (⭐3.7k) - A lightweight popup like tooltips, fully customizable with arrow and animations.
• ChuckerTeam/chucker (⭐3.9k) - An on-device network inspection tool for Android.
• rosariopfernandes/firecoil (⭐44) - Display images stored in Cloud Storage for Firebase using Coil.
• skydoves/Only (⭐481) - An easy way to persist and run code block only as many times as necessary on Android.
• skydoves/AndroidVeil (⭐1.5k) - An easy, flexible way to implement veil skeletons and shimmering effect for Android.
• skydoves/Submarine (⭐474) - Fully customizable floating navigation view for listing items dynamically on Android.
• skydoves/Needs (⭐613) - An easy way to implement modern permission instructions popup.
• evilthreads669966/EvadeMe (⭐41) - A heuristics evasion library that prevents your code from being analyzed or tested.
• evilthreads669966/BootLaces (⭐34) - Turns your background service persistent.
• evilthreads669966/WakeService - An IntentService that keeps your processor awake while doing work.
• evilthreads669966/Pickpocket (⭐28) - An asynchronous Android library for content providers and more.
• evilthreads669966/EasyShells - A simple shell for executing Linux commands with responses
• mr-wizman/Consent (⭐4) - Easy Android permissions. Powered by Kotlin.
• matteocrippa/Parrot (⭐22) - A lightweight library to load remote image and handle caching in ImageView.
• deva666/peko (⭐152) - Android library for requesting runtime permissions with Kotlin Coroutines
• MackHartley/DashedView (⭐69) - The easiest way to create a dashed or striped background on Android
• MackHartley/RoundedProgressBar (⭐783) - A customizable, animated progress bar that features rounded corners. This Android library is designed to look great and be simple to use
• developingdeveloper-tech/toaster-android (⭐27) - A simple library to add custom toast to android applications.
• heart-switch (⭐61) - A heart-shaped toggle switch component for Jetpack Compose
• Blueprint (⭐134) - 📐 A library that draws a blueprint on top of your Jetpack Compose composables. It visualizes dimensions, like paddings and sizes.
• OTPComposable (⭐2) - A library dedicated to making OTP (One Time Password) components a breeze to implement

Frameworks ^{Back ⇈}

• nekocode/kotgo (⭐1.6k) - An android development framework on kotlin using MVP architecture.
• lightningkite/kotlin-core (⭐36) - A full framework for making Android apps. Based on Anko and Kotson.
• codenameone/CodenameOne (⭐1.7k) - Open source cross platform mobile development framework that offers write once run anywhere native development for iOS (iPhone/iPad), Android, Windows & more using Kotlin & Java
• hpost/rx-mvi (⭐8) - Minimal framework for Model View Intent inspired Android applications written in Kotlin.
• LouisCAD/Splitties (⭐2.5k) - A family of small Kotlin libraries for delightful Android development including View DSLs
• Miha-x64/Lychee (⭐119) - Data binding and persistence infrastructure for building Android and JavaFX UIs and binding them with data
• 0xe1f/ararat (⭐33)

Projects ^{Back ⇈}

• BanDev/Buddha-Quotes (⭐37) - A collaborative project to create a Free and Open Source Buddha Quotes app.
• antoniolg/Bandhook-Kotlin (⭐1.9k) - A showcase music app for Android entirely written using Kotlin language.
• antoniolg/Kotlin-for-Android-Developers (⭐2.7k) - Companion App for the book "Kotlin Android Developers".
• damianpetla/kotlin-dagger-example (⭐535) - Example of Android project showing integration with Kotlin and Dagger 2.
• dodyg/AndroidRivers (⭐321) - RSS Readers for Android.
• MakinGiants/banjen (⭐11) - Android app to help to tune a banjo.
• inaka/kotlillon (⭐33) - Android Kotlin Examples.
• MakinGiants/todayhistory (⭐30) - App that shows what happened today in history.
• RxKotlin/Pocket (⭐32) - This app help user to save links easily, and can export to Evernote as weekly.
• SidneyXu/AndroidDemoIn4Languages (⭐195) - Comparison between Java, Groovy, Scala, Kotlin in Android Development.
• inorichi/tachiyomi - Free and open source manga reader for Android.
• skydoves/DisneyMotions (⭐1.5k) - A beautiful Disney app using transformation motions based on MVVM architecture.
• ziggy42/Blum-kotlin (⭐83) - A simple android Twitter client written in Kotlin
• TwidereProject/Twidere-Android (⭐2.7k) - Material Design ready and feature rich Twitter app for Android 4.0+
• SimpleMobileTools/Simple-Calendar (⭐3.5k) - A simple calendar with events, customizable widget and no ads.
• SimpleMobileTools/Simple-Camera (⭐768) - A camera with flash, zoom and no ads.
• SimpleMobileTools/Simple-Draw (⭐516) - A canvas you can draw on with different colors.
• SimpleMobileTools/Simple-File-Manager (⭐1.5k) - A simple file manager for browsing and editing files and directories.
• SimpleMobileTools/Simple-Gallery (⭐3.6k) - A gallery for viewing photos and videos without ads.
• SimpleMobileTools/Simple-Notes (⭐828) - A simple textfield for adding quick notes without ads.
• ahong222/happy21 (⭐14) - A simple game of Black-Jack write with kotlin
• AllanWang/KAU (⭐220) - An extensive collection of Kotlin Android Utils
• inshiro/Kodesh (⭐13) - Free and open source Bible for Android
• hanjoongcho/aaf-easyphotomap (⭐41) - This is a photomap app that shows photos taken on a map.
• Karumi/KataScreenshotKotlin (⭐76) - An full exercise to learn how to create screenshot tests for Android
• massivedisaster/AFM (⭐12) - A library to help android developers work easily with activities and fragments with Kotlin
• mustafaberkaymutlu/uv-index (⭐67) - A simple ultraviolet index viewer app for demonstrating Instant Apps + Kotlin + Dagger + MVP
• Karumi/KataSuperHeroesKotlin (⭐86) - A full exercise to learn how to create espresso tests using test doubles and a dependency injector for Android written in Kotlin.
• Karumi/KataContactsKotlin (⭐49) - An exercise to learn how to write software based on Clean Architecture using Kotlin.
• Karumi/KataTODOApiClientKotlin (⭐60) - A full exercise to learn how to use stubbing HTTP in Kotlin.
• Karumi/MaxibonKataKotlin (⭐43) - A ready to use playground to learn how to write tests using property-based testing in Kotlin.
• hanjoongcho/aaf-easypassword (⭐35) - A password manager using a single lock pattern for various type passwords management.
• WilderPereira/lmgtfyGen (⭐6) - Simple Android App to generate Let Me Google That For You urls.
• WilderPereira/ftwfy (⭐3) - The real life Command/Ctrl + F - Android App that uses the Mobile Vision API to allow you to search for any occurrence of a text in a digital document.
• hanjoongcho/aaf-easydiary (⭐434) - This is a diary application optimized to user experience.
• adrielcafe/GreenHellCompanionApp (⭐4) - Unofficial companion app for the game Green Hell.
• adrielcafe/ChromaAndroidApp (⭐111) - Chromatic tuner app.
• cuongpm/youtube-dl-android (⭐516) - Video downloader for Android - Download videos from Youtube, Facebook, Twitter, Instagram, Dailymotion, Vimeo and more than 1000 other sites.
• dgngulcan/droid-feed (⭐187) - News feed aggregated exclusively for Android Developers.
• VMadalin/kotlin-sample-app (⭐2.4k) - Android Sample App using modular, clean, scalable, testable Architecture written in Kotlin following the best practices with Jetpack
• PatilShreyas/Foodium (⭐2.3k) - Foodium is a sample food blog Android application built to demonstrate use of Modern Android development tools - (Kotlin, Coroutines, Flow, Dagger 2, Architecture Components, MVVM, Room, Retrofit, Moshi, Material Components).
• skydoves/MarvelHeroes (⭐1.2k) - A sample Marvel heroes application based on MVVM (ViewModel, Coroutines, LiveData, Room, Repository, Koin) architecture.
• halilozel1903/LearnKotlinProgramming (⭐7) - Let's Learn Kotlin Programming ❤️
• halilozel1903/KotlinTutorials (⭐111) - It's a project that contains lessons and examples about Kotlin programming language.
• android-password-store/Android-Password-Store (⭐2.6k) - Android application compatible with ZX2C4's Pass command line application.
• PatilShreyas/NotyKT (⭐1.7k) - NotyKT is a complete Kotlin-stack (Backend + Android) application built to demonstrate the use of Modern development tools with best practices implementation.
• Marwa-Eltayeb/CurrencyExchange (⭐11) - Currency Exchange App that displays real-time currency rates, shows a chart for any currency pair in the world to see their currency history and provides a currency converter.
• AmrDeveloper/Linkhub (⭐175) - Free and open source effective link management app with no ads.
• AnkitSuda/Rebound (⭐181) - Feature Rich & Highly Customizable Workout Log App.

Extensions ^{Back ⇈}

• ajalt/timberkt (⭐204) - Easy Android logging with Kotlin and Timber.
• rosariopfernandes/fireXtensions (⭐29) - Unofficial Kotlin Extensions for the Firebase Android SDK.
• matteocrippa/karamba (⭐51) - A Swiss army knife of useful extensions for Kotlin

Tools ^{Back ⇈}

• kiruto/debug-bottle (⭐855) - Debug Bottle is an Android runtime debug / develop tools written using kotlin language.
• didi/booster (⭐4.9k) - Booster is an optimization toolkit for Android applications
• Kotlin/kdoctor (⭐606) - CLI tool that helps to set up the environment for Kotlin Multiplatform Mobile app development.
• jzbrooks/vgo (⭐41) - vgo is a tool for optimizing and converting between vector artwork representations.

Tests ^{Back ⇈}

• KakaoCup/Kakao (⭐330) - Nice and simple DSL for Espresso in Kotlin
• KakaoCup/Compose (⭐146) - Nice and simple DSL for Espresso Compose UI testing in Kotlin

Multiplatform ^{Back ⇈}

• Reedyuk/blue-falcon (⭐338) - A unified Bluetooth library for Android and iOS.
• cossacklabs/themis (⭐1.9k) - Multi-language framework for solving typical data security tasks: storage and messaging encryption, authentication, works for 14 languages.

Boilerplate ^{Back ⇈}

• bufferapp/android-clean-architecture-mvi-boilerplate (⭐976) - A clean architecture boilerplate using android written in Kotlin and using the Model-View-Intent pattern
• bufferapp/clean-architecture-components-boilerplate (⭐1.3k) - A clean architecture boilerplate using andorid architecture components for android written in Kotlin
• bufferapp/android-clean-architecture-boilerplate (⭐3.7k) - A clean architecture boilerplate for android written in Kotlin

Kotlin JavaScript ^{Back ⇈}

JavaScript ^{Back ⇈}

• andrewoma/reakt (⭐265) - Reakt is a Kotlin wrapper for facebook's React library.
• pixijs/pixi-native (⭐87) - The aim of this project is to provide a fast lightweight 2D library that works across all devices.
• shafirov/klogging (⭐34) - Kotlin logging, both js and jvm.
• stangls/kotlin-js-jquery (⭐20) - A small framework for writing client -side web -applications in Kotlin.
• Kotlin/kotlin-fullstack-sample (⭐1.2k) - Kotlin Full-stack Application Example.
• danfma/kodando (⭐75) - Kotlin JS bindings and libraries.
• kengorab/kotlin-javascript-boilerplate (⭐10) - An extremely barebones boilerplate project for compiling Kotlin to Javascript.
• markaren/three-kt-wrapper (⭐56) - Kotlin wrappers for three.js JavaScript 3D library
• rjaros/kvision (⭐1.2k) - Object oriented Web UI framework for Kotlin/JS
• nosix/vue-kotlin (⭐194) - Libraries and tools supporting the use of Vue.js in Kotlin
• Kabbura/Kunafa (⭐165) - Easy to use, high level framework in Kotlin for front-end web-development and creating web apps without using HTML, CSS, or JavaScript.
• Foso/MpApt (⭐236) - Kotlin Native/JS/JVM Annotation Processor library
• fortytwoapps/kstitch (⭐5) - An object oriented toolkit for MongoDB Stitch in KotlinJS.

Frontend ^{Back ⇈}

• olegcherr/Aza-Kotlin-CSS (⭐85) - Kotlin DSL for CSS

Game Development ^{Back ⇈}

• perses-games/kudens (⭐30) - Develop browser games in Kotlin
• Ayfri/PIXI-Kotlin (⭐15) - Typings for the graphics library PixiJs

Build Tools ^{Back ⇈}

• Kotlin/kotlin-frontend-plugin (⭐563) - Gradle Kotlin plugin for frontend development.
• huston007/kotlin-loader (⭐25) - Kotlin webpack loader.

Integration ^{Back ⇈}

• kotlin/ts2kt (⭐316) - Converter of TypeScript definition files to Kotlin declarations (stubs).
• Kotlin/dukat (⭐552) - Converter of to Kotlin external declarations

Kotlin Native ^{Back ⇈}

Projects ^{Back ⇈}

• JetBrains/kotlin-native (⭐7k) - Kotlin/Native is a LLVM backend for the Kotlin compiler, runtime implementation and native code generation facility using LLVM toolchain.
• perses-games/konan-sfml (⭐18) - Kotlin native with SFML example
• JetBrains/kotlinconf-spinner (⭐628) - Simple spinner-like game intended to demonstrate capabilities of Kotlin/Native software stack.
• trueangle/kotlin-native-aws-lambda-runtime (⭐4) - A runtime for executing AWS Lambda functions written in Kotlin/Native, designed to reduce cold start issues common with the JVM platform.

Frameworks ^{Back ⇈}

• KwangIO/kwang (⭐59)
• msink/kotlin-libui (⭐650)

Kotlin WebAssembly ^{Back ⇈}

Official Links ^{Back ⇈}

• Kotlin/Wasm Overview - Learn everything about Kotlin WebAssembly platform

Examples ^{Back ⇈}

• Kotlin/Wasm Examples (⭐519) - Explore a variety of Kotlin/Wasm example projects, showcasing applications like Compose Multiplatform, browser DOM API, Node.js, and WASI integration.