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

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Links ^{Back ⇈}

Official Links ^{Back ⇈}

26458 JetBrains/kotlin
1109 Kotlin/KEEP - Kotlin Evolution and Enhancement Process
0 Home Page
0 Language Reference
0 Public chat archive of Kotlin's Slack
0 Try Kotlin!
0 Blog
0 Issue Tracker
0 Twitter
0 Slack (18k+ users)
0 Forum

Resources ^{Back ⇈}

2621 dbacinski/Design-Patterns-In-Kotlin - Design Patterns implemented in Kotlin.
411 From Java To Kotlin
120 Kotlin coding puzzles - Set of programming challenges thats helps to improve whiteboard coding and problem-solving skills.
2 AlexeySoshin/Hands-on-Design-Patterns-with-Kotlin - Code examples for 'Hands-on Design Patterns with Kotlin' book
0 Kotlin Cheat Sheet
0 Trending Kotlin on Github
0 Antonio Leiva - Android and any other monsters
0 Programming Community Curated Resources for learning Kotlin
0 LinkedIn: Kotlin Developers (Join!)
0 Kotlin - Google+
0 /r/Kotlin
0 Podcast: Talking Kotlin - A Podcast on Kotlin and more
0 Quora Kotlin
0 Kotlin Kōans Android app - Learn Kotlin with short coding challenges on your Android device
0 Kotlin Guide - An introduction to Kotlin
0 Kotlin Academy - Blog that teach about Kotlin
0 Kotlin Expertise Blog - A Blog with many articles covering basic and advanced Kotlin topics.
0 Google's Kotlin Codelab - Build your first Kotlin Android App
0 Kotlin Quiz - Are You a Kotlin Expert? Test Your Skills with the Kotlin Quiz!
0 SuperKotlin - A website about Kotlin
0 Stackoverflow Documentation on Kotlin

Books and Courses ^{Back ⇈}

0 Kotlin in Action - Dmitry Jemerov, Svetlana Isakova
0 Kotlin for Android Developers - Antonio Leiva
0 Programming Kotlin - Stephen Samuel, Stefan Bocutiu
0 Fundamental Kotlin, First Edition - Learn Kotlin quickly from the start
0 Kotlin for Java Developers - 160-minute Android Course.
0 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
0 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
0 Kotlin Programming: Next Level Java Development - Learn coding in Kotlin from scratch!
0 Introduction to Kotlin Programming by Hadi Hariri - From Hello World to Interoperability with Java
0 Advanced Kotlin Programming - From Nested Functions to Asynchronous Programming
0 Kotlin an Introduction - Caster.io - Kotlin introductory course at Caster.io
0 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
0 Mastering Android Development with Kotlin - Miloš Vasić - Master Android development using a variety of Kotlin features
0 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.
0 Kotlin Apprentice - Irina Galata, Joe Howard, Richard Lucas & Ellen Shapiro - Beginning programming with Kotlin
0 Android Apprentice - Darryl Bayliss & Tom Blankenship - Beginning Android programming using Kotlin
0 Hands-on Design Patterns with Kotlin - Alexey Soshin - Book that covers building scalable applications using traditional, reactive, and concurrent design patterns in Kotlin

Libraries/Frameworks ^{Back ⇈}

Web ^{Back ⇈}

4674 ktorio/ktor - Web backend framework for Kotlin. Easy to use, fun and asynchronous.
2366 tipsy/javalin - A Simple REST API Library for Java/Kotlin.
979 jooby-project/jooby - Modular micro web framework for Java and Kotlin
778 perwendel/spark-kotlin - A DSL in idiomatic Kotlin for the Spark web framework.
594 Kotlin/kotlinx.html - Kotlin DSL for HTML.
501 hhariri/wasabi - An HTTP Framework built with Kotlin for the JVM.
477 TinyMission/kara - Web framework written in Kotlin.
299 SeunAdelekan/Kanary - A micro webframework for Kotlin
251 hypercube1024/firefly - An asynchronous web framework for rapid development of high-performance web application.
247 pgutkowski/KGraphQL - A GraphQL implementation written in Kotlin
229 zhudyos/duic Distributed configuration center（分布式配置中心）:new:
186 kwebio/core - kweb.io Build rich live-updating web apps in pure server-side Kotlin.
122 kohesive/kovert - An invisible, super easy and powerful REST and Web framework over Vert.x or Undertow.
120 vert-x3/vertx-lang-kotlin - This module provides Kotlin language bindings including DSL and extension functions for vert.x 3
117 taskworld/kraph - GraphQL request string builder written in Kotlin
116 hexagonkt/hexagon - A Microservices framework that takes care of HTTP, serialization and storage.
94 mvysny/vaadin-on-kotlin - A simple way to write full-stack database-backed component-oriented web apps
83 jean79/yested - A Kotlin framework for building web applications in Javascript.
79 ExpediaDotCom/graphql-kotlin - Code-only GraphQL schema generation for Kotlin
79 MarioAriasC/KotlinPrimavera - Spring support libraries for Kotlin.
73 brianmadden/krawler - A web crawling framework written in Kotlin
41 gimlet2/kottpd - REST framework in pure Kotlin, inspired by spark-java
36 danneu/kog - A web framework focused on simplicity, middleware, and functional composition
20 sepatel/tekniq - Full-feature HTTP DSL Framework, HTTP Client, JDBC DSL, Loading Cache and Configuration
11 bootique/bootique-kotlin - Provides extension function and features for smooth development with Bootique and Kotlin.
9 phenax/h - HTML templating library written in Kotlin
6 laviua/komock - HTTP/Consul/SMTP/Spring Config mocker framework written in Kotlin
0 http4k/http4k - Toolkit for serving and consuming HTTP services in a functional and consistent way.
0 skrapeit/skrape.it HTML testing and web scraping library providing an intuitive DSL to receive and either extract or check markup (a jSoup wrapper DSL with extra functionality) 🆕

Tests ^{Back ⇈}

1648 nhaarman/mockito-kotlin - Using Mockito with Kotlin.
1614 JetBrains/spek - A specification framework for Kotlin.
1517 mockk/mockk - Pure Kotlin mocking library.
1403 kotlintest/kotlintest - KotlinTest is a flexible and comprehensive testing tool for the Kotlin ecosystem based on and heavily inspired by the superb Scalatest.
471 MarkusAmshove/Kluent - Fluent Assertion-Library for Kotlin.
248 npryce/hamkrest - A reimplementation of Hamcrest to take advantage of Kotlin language features.
148 winterbe/expekt - BDD assertion library for Kotlin.
105 karumi/KotlinSnapshot - Verify your data with snapshot testing.
83 robstoll/atrium - Fluent assertion library for Kotlin supporting i18n.
44 EPadronU/balin - Balin is a browser automation library for Kotlin. It's basically a Selenium-WebDriver wrapper library inspired by Geb.
36 qwertukg/SeleniumBuilder - DSL for Selenium 2.0. Provide a possibility to write tests in Kotlin builder style.
30 dam5s/aspen - Aspen is an RSpec and Spek inspired test runner for Kotlin.
26 xgouchet/Elmyr - A utility to make Kotlin/Java tests random yet reproducible
19 dmcg/konsent - An acceptance test library for Kotlin.
14 tyro/arbitrater - Arbitrater is a library for creating arbitrary (randomized) instances of classes by reflection for use in testing.
11 neworld/kupiter - Kotlin DSL for Junit5
6 dmcg/k-sera - A JMock wrapper for Kotlin.
5 mvysny/DynaTest - Write your tests in DSL way. Runs on JUnit5 Platform.

Dependency Injection ^{Back ⇈}

3066 Ekito/koin - A functional Kotlin dependency injection framework for Android and JVM.
1650 Kodein-Framework/Kodein-DI - Painless Kotlin Dependency Injection.
144 traversals/kapsule - Minimalist dependency injection library for Kotlin.
28 authzee/kotlin-guice - Guice DSL extensions for Kotlin
13 kailan/kodeinject - Constructor dependency injection for Kodein.
12 JLLeitschuh/kotlin-guiced - Convenience Kotlin API over the Google Guice DI Library.

Coroutines ^{Back ⇈}

4253 Kotlin/kotlinx.coroutines - Libraries built upon Kotlin coroutines.
1001 Kotlin/kotlin-coroutines - Design documents and examples for coroutines in Kotlin.
236 konrad-kaminski/spring-kotlin-coroutine - Kotlin coroutine support for Spring.
125 soywiz/korio - Korio: Kotlin cORoutines I/O: Streams + Async TCP Client/Server + Virtual File System for JVM, Node.JS and Browser.
121 marcoferrer/kroto-plus - Protoc plugin for bringing together Kotlin, Protobuf, Coroutines, and gRPC.
97 cloudoptlab/cloudopt-next - A next-generation Java web lightweight framework based on vertx and kotlin.
19 soywiz/korui - Korui: Kotlin cORoutines User Interfaces: korio + kimage + korui
16 soywiz/korim - Korim: Kotlin cORoutines IMaging utilities depending on Korio.

Functional Programming ^{Back ⇈}

5307 ReactiveX/RxKotlin - RxJava bindings for Kotlin.
2413 arrow-kt/arrow - Functional companion to Kotlin's Standard Library.
2061 reactor/reactor-core - Non-Blocking Reactive Streams Foundation for the JVM. Natively supports Kotlin, since 3.1.0.M3.
414 brianegan/bansa - A state container for Kotlin & Java, inspired by Elm & Redux.
399 kittinunf/Result - The modelling for success/failure of operations in Kotlin.
235 pardom/redux-kotlin - Direct port of Redux for Kotlin.
103 beyondeye/Reduks - A "batteries included" port of Reduxjs for Kotlin+Android
85 h0tk3y/kotlin-monads - Monads for Kotlin
78 pakoito/Komprehensions - Do comprehensions for Kotlin and 3rd party libraries.
58 michaelbull/kotlin-result - A Result monad for modelling success or failure operations - inspired by Elm, Rust, & Haskell.
35 UrbanCompass/Snail-Kotlin - An observables framework for Kotlin.
23 poetix/klenses - Lenses for Kotlin.

JSON ^{Back ⇈}

1027 cbeust/klaxon - Lightweight library to parse JSON in Kotlin.
608 SalomonBrys/Kotson - Gson for Kotlin, Kotson enables you to parse and write JSON with Google's Gson using a conciser and easier syntax.
549 FasterXML/jackson-module-kotlin - Jackson module that adds support for serialization/deserialization of Kotlin classes and data classes.
41 Jire/KTON - Object notation in pure Kotlin!
23 s4kibs4mi/kotlin-jsonq - A simple Kotlin library to Query over Json Data.
14 fluidsonic/fluid-json - A JSON library written in pure Kotlin.
7 fboldog/ext4klaxon - Type Extensions (Long, Int, Enum, Date) for Klaxon.
4 Shengaero/kotlin-json - A lightweight, stylistic, optimized, and multiplatform JSON library for Kotlin-JVM and Kotlin-JS
4 Yummypets/JSON.kt - Kotlin JSON Parsing that infers type

Database ^{Back ⇈}

4484 Raizlabs/DBFlow - A blazing fast, powerful, and very simple ORM android database library that writes database code for you.
3488 jankotek/mapdb - 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.
2716 requery/requery - Modern SQL based query & persistence for Java/Kotlin/Android.
2361 JetBrains/Exposed - Exposed is a prototype for a lightweight SQL library written over JDBC driver for Kotlin language.
2192 square/sqldelight - Generates Java models from CREATE TABLE statements.
307 dizitart/potassium-nitrite - Potassium Nitrite is a kotlin extension of nitrite database, an open source nosql embedded document store with mongodb like api.
229 jasync-sql/jasync-sql - Kotlin port of mauricio's async driver for postgres/mysql.
195 cheptsov/kotlin-nosql - NoSQL database query and access library for Kotlin.
186 Litote/kmongo - KMongo - Kotlin toolkit for Mongo
184 andrewoma/kwery - Kwery is an SQL library for Kotlin.
151 x2bool/kuery - Typesafe SQL with Kotlin.
135 consoleau/kotlin-jpa-specification-dsl - This library provides a fluent DSL for querying spring data JPA repositories using spring data Specifications.
105 seratch/kotliquery - A handy database access library in Kotlin.
102 s4kibs4mi/PultusORM - PultusORM is a sqlite ORM library for kotlin on top of sqlite jdbc driver.
22 KotlinPorts/kt-postgresql-async - Kotlin/Gradle port of mauricio's async driver for postgres/mysql.
8 shyiko/levelkt - LevelDB client for Kotlin and/or Java 8+.
7 SubiyaCryolite/jds - Jenesis Data Store: a dynamic, cross platform, high performance, ORM data-mapper. Designed to assist in rapid development and data mining.
6 Ganet/rxaerospike - RxJava2 wrapper for aerospike-client-java.
1 fluidsonic/fluid-mongo - Coroutine support for MongoDB built on top of the official MongoDB Asynchronous Java Driver.
0 pm-dev/kotlin-gremlin-ogm - Kotlin-gremlin-ogm is a type-safe object/graph mapping library for Gremlin enabled graph databases.

Tools ^{Back ⇈}

1990 shyiko/ktlint - Kotlin linter.
1709 arturbosch/detekt - Static code analysis for Kotlin.
925 Kotlin/dokka - Documentation Engine for Kotlin.
805 holgerbrandl/kscript - Scripting utils for Kotlin.
364 jtransc/jtransc - JVM AOT compiler created in Kotlin.
236 jmfayard/buildSrcVersions - Better Gradle dependencies management inside the IDE. Search for available updates.
64 s1monw1/KtsRunner - Library for executing .kts files from regular Kotlin code using Java Scripting Engines API
20 kohesive/keplin - Secure Kotlin scripting and binary lambda-scripts.
11 cypressious/KotlinW - A small wrapper for the Kotlin compiler that can be used to execute .kts scripts.
10 Vorlonsoft/GradleMavenPush - Gradle Script plugin to upload Gradle Android/Kotlin/Java Artifacts to Maven repositories (JCenter, Maven Central, ...).
5 Vorlonsoft/EasyDokkaPlugin - Gradle Script plugin to generate documentation by Dokka for Kotlin and Java, Android and non-Android projects.

Desktop ^{Back ⇈}

2154 edvin/tornadofx - Lightweight JavaFX Framework for Kotlin/

Http Clients ^{Back ⇈}

2585 kittinunf/Fuel - The easiest HTTP networking library for Kotlin/Android.
273 jkcclemens/khttp - Kotlin HTTP requests library.
216 rybalkinsd/kohttp - Kotlin DSL-based HTTP client.
29 egorzhdan/networkinkt - Multiplatform coroutine-based HTTP client.
7 CuriousNikhil/Asynkio - Write your asynchronous Network / IO call painlessly in Kotlin.

Editors ^{Back ⇈}

7403 JetBrains/intellij-community - IntelliJ IDEA Community Edition
284 udalov/kotlin-vim - Kotlin Syntax Highlighter for Vim.
97 mathiasfrohlich/vscode-kotlin - Kotlin language support for VS Code.
84 vkostyukov/kotlin-sublime-package - A Sublime Package for Kotlin.
82 ftomassetti/kanvas - A truly hackable editor: simple, lightweight, understandable.
27 ice1000/NppExtension - Kotlin Language extension for Notepad++
21 alexmt/atom-kotlin-language - Adds syntax highlighting to Kotlin files in Atom
8 sargunster/kotlin-textmate-bundle - Kotlin bundle for TextMate.

Syntax Highlighters ^{Back ⇈}

13780 isagalaev/highlight.js - Javascript syntax highlighter. (out-of-date)
6487 github/linguist - For Ruby/Github, uses Sublime package
2451 jneen/rouge - A pure-ruby code highlighter that is compatible with pygments. (wip)
35 cansik/kotlin-latex-listing - A syntax highlighting template for the Kotlin language in LaTeX listings.
0 birkenfeld/pygments-main - Python syntax highlighter.

Game Development ^{Back ⇈}

837 AlmasB/FXGL - JavaFX 8 Game Library written in Java + Kotlin
504 libktx/ktx - Kotlin utilities for LibGDX applications.
289 Hexworks/zircon - An extensible text GUI library which targets multiple platforms and designed specifically for game developers, written in Kotlin.
268 icela/FriceEngine - Make game developing easy again!
11 vassilibykov/AdventKT - A Kotlin-based DSL for text adventures, with a partial replica of the classic Colossal Cave as an example.

Misc ^{Back ⇈}

3450 puniverse/quasar - Fibers, Channels and Actors for the JVM.
801 ingokegel/jclasslib - jclasslib bytecode viewer is a tool that visualizes all aspects of compiled Java class files and the contained bytecode.
708 MicroUtils/kotlin-logging - Lightweight logging framework for Kotlin. Used as a wrapper for slf4j with Kotlin extensions.
618 mplatvoet/kovenant - Promises for Kotlin and Android
392 moove-it/fakeit - Generates realistic fake data — like names, emails, dates, countries — to be used in your Android development environment.
335 moshbit/Kotlift - Kotlift is the first source-to-source language transpiler from Kotlin to Swift.
300 cretz/asmble - Compile WebAssembly to JVM and other WASM tools.
273 hotchemi/khronos - An intuitive Date extensions in Kotlin.
196 holgerbrandl/krangl - krangl is a {K}otlin library for data w{rangl}ing
182 soywiz/klock - Consistent and portable date and time utilities for multiplatform kotlin (JVM, JS and Common).
150 Kotlin/kotlinx.atomicfu - The idiomatic way to use atomic operations in Kotlin.
142 MehdiK/Humanizer.jvm - Humanizer.jvm meets all your jvm needs for manipulating and displaying strings, enums, dates, times, timespans, numbers and quantities.
142 yole/kxdate - Kotlin extensions for Java 8 java.time API
118 kohesive/klutter - A mix of random small libraries for Kotlin, the smallest reside here until big enough for their own repository.
113 TicketmasterMobileStudio/actions-on-google-kotlin - Port of official Node.js SDK to Kotlin. Complete with all features and tests and nearly identical API.
99 h0tk3y/better-parse - A nice parser combinator library for Kotlin
91 kohesive/solr-undertow - Solr Standalone Tiny and High performant server.
80 Kotlin/kotlinx.reflect.lite - Lightweight library allowing to introspect basic stuff about Kotlin symbols.
66 debop/koda-time - Joda Time Extensions in Kotlin. (From Java 8 use java.time instead)
63 KotlinNLP/SimpleDNN - 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.
61 vjames19/kotlin-futures - A collections of extension functions to make the JVM Future, CompletableFuture, ListenableFuture API more functional and Kotlin like.
56 consoleau/kassava - This library provides some useful kotlin extension functions for implementing toString() and equals() without all of the boilerplate.
54 s1monw1/TLSLibrary - Simple TlsLibrary written in Kotlin - Provides DSL for creating TLS connections
51 leprosus/kotlin-hashids - Library that generates short, unique, non-sequential hashes from numbers.
44 holgerbrandl/kravis - A Kotlin grammar for scientific data visualization
40 Jire/Strukt - Value types on the JVM, today!
37 ziggy42/kolor - A library to print colored strings, with Kotlin.
32 czyzby/kotlin-times - A simple utility library for readable loops.
31 cesarferreira/kotlin-pluralizer - Kotlin extension to pluralize and singularize strings.
31 phxql/aleksa - Aleksa is a small framework for writing Alexa Skills in Kotlin.
23 MiloszKrajewski/stateful4k - State Machine Construction Kit for Kotlin
23 pemistahl/lingua - A language detection library suitable for long and short text alike
19 kunalsheth/units-of-measure - A type-safe dimensional analysis library for Kotlin.
18 mplatvoet/progress - Progress for Kotlin.
17 sargunster/CakeParse - Simple parser combinator library for Kotlin.
16 spoptchev/scientist - A kotlin library for refactoring code. Port of GitHub's scientist.
15 korlibs/kds - Optimized Kotlin Data Structures for JVM, JS and Common
14 sargunster/KtUnits - Tiny unit conversion library for Kotlin.
13 charleskorn/kaml - YAML support for kotlinx.serialization
11 evoasm/kasm - x64/x86-64 assembler and execution library
9 spoptchev/kotlin-preconditions - Precondition error checking in kotlin.
5 JoelW-S/groothy - Kotlin implementation of Groovy Truth.
2 meiblorn/kotidgy — Index-based text data generator written in Kotlin
1 d-max/dsl-logger - Simple DSL for logging with logger abstraction layer
1 nickhristov/krakdown - A native markdown parser written in Kotlin.
1 sandjelkovic/kxjtime - Lightweight Kotlin extensions for java.time API

Extensions ^{Back ⇈}

51 Kotlin/kotlinx.support - Extension and top-level functions to use JDK7/JDK8 features in Kotlin 1.0.
49 vanshg/KrazyKotlin - A collection of useful Kotlin Extension
17 hankdavidson/ktime - Extensions to the java8 time library

Configuration ^{Back ⇈}

159 npryce/konfig - A Type Safe Configuration API for Kotlin
77 uchuhimo/konf - A type-safe cascading configuration library for Kotlin/Java, supporting most configuration formats
68 config4k/config4k - A Kotlin wrapper for Typesafe Config
60 jdiazcano/cfg4k - Flexible and easy to use config library written in kotlin.
33 mariomac/kaconf - KickAss Configuration. An annotation-based configuration system for Java and Kotlin
11 ufoscout/properlty - Simple configuration library with placeholders resolution and zero magic!
8 daviddenton/configur8 - A Kotlin port of Configur8 - A Type Safe Configuration API for Kotlin, extendable to user-defined types.

Graphics ^{Back ⇈}

179 data2viz/data2viz - multiplatform dataviz library, d3js port
172 kotlin-graphics/imgui - jvm port of imgui
63 kotlin-graphics/kotlin-unsigned - Unsigned operators and boxed types (Ubyte, Uint, Ulong and Ushort) for unsigned support.
53 java-opengl-labs/modern-jogl-examples - port of 'Learning Modern 3D Graphic Programming' by J.L.McKesson (jogl)
42 kotlin-graphics/assimp - Open Asset Import Library port
35 kotlin-graphics/glm - g-truck glm port, opengl mathematics library
26 java-opengl-labs/learn-OpenGL - port of https://learnopengl.com/ tutorial (lwjgl)
17 java-opengl-labs/Vulkan - port of https://github.com/SaschaWillems/Vulkan
16 soywiz/kaifu2x - Waifu2x port to Kotlin as library and CLI. Convolutional-neural-network based upscaler for Anime-like images and noise/artifact reduction.
15 kotlin-graphics/bullet - bullet port
14 kotlin-graphics/uno-sdk - Unofficial OpenGL SDK
13 GlimpseFramework/glimpse-framework - OpenGL made simple.
11 kotlin-graphics/openvr - OpenVR binding
10 kotlin-graphics/gli - g-truck gli port, image library
9 Jonatino/JOGL2D - Zero-overhead 2D rendering library for JOGL using Kotlin.
3 kotlin-graphics/ovr - Oculus binding
1 nwillc/ksvg - Kotlin SVG image generation DSL, supporting inline and file formats.

Data Science ^{Back ⇈}

522 thomasnield/kotlin-statistics - Advanced math and statistical extensions for Kotlin.
267 sekwiatkowski/Komputation - A neural network framework written in Kotlin.
196 holgerbrandl/krangl - krangl is a {K}otlin library for data w{rangl}ing.
190 kyonifer/koma - A scientific computing library for Kotlin.
153 ligee/kotlin-jupyter - Kotlin kernel for Jupyter/iPython.
98 MarcinMoskala/KotlinDiscreteMathToolkit - Set of extensions for Kotlin that provides Discrete Math functionalities as an Kotlin extension functions.
33 sanity/pairAdjacentViolators - A Kotlin implementation of the Pair Adjacent Violators algorithm for isotonic regression.

Command Line Interface ^{Back ⇈}

354 xenomachina/kotlin-argparser - Easy to use and concise yet powerful and robust command line argument parsing for Kotlin.
262 ajalt/clikt - Clikt - Intuitive command line interface parsing for Kotlin.
82 ajalt/mordant - Mordant - Full-featured text styling for Kotlin command line applications.
38 jimschubert/kopper - A simple Kotlin option parser
35 leprosus/kotlin-cli - Kotlin-CLI - command line interface options parser for Kotlin.
3 aPureBase/arkenv - Fully fledged command line arguments / environment variables parser via simple Kotlin delegates

Browsers ^{Back ⇈}

38 wendigo/chrome-reactive-kotlin - Chrome Debugging Protocol for Kotlin (with RxJava2)

Projects ^{Back ⇈}

Web ^{Back ⇈}

2713 corda/corda - Corda is a distributed ledger platform designed to record, manage and automate legal agreements between business partners.
450 sdeleuze/spring-boot-kotlin-demo - Basic Spring Boot app in Kotlin.
413 mixitconf/mixit - MiXiT website
148 eddywm/KTFLITE - Computer Vision on Android with Kotlin and Tensorflow Lite.
49 ssouris/petclinic-spring5-reactive - Spring 5 Reactive Petclinic app written in Kotlin.
35 derveloper/kiny - Your super simple private serverless service running your kotlin functions like AWS lambda.
31 ratpack/example-ratpack-gradle-kotlin-app - An example of a Kotlin Ratpack app built with Gradle.
21 spolnik/JAlgoArena - 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.
12 IRus/kotlin-dev-proxy - Simple server for proxy requests and host static files written in Kotlin, Spark Java and Apache HttpClient.
6 ivanpopelyshev/vertx-facebook-messenger - Seed project for facebook messenger bots. Vertx, Kotlin.
6 rocketraman/kotlin-web-hello-world - This project shows how to do a web-based "Hello World!" with Kotlin in combination with various JVM - based web frameworks.
5 mariomac/codebuilder - Demo app about asynchronous architectures for long-response-time web applications.
5 yyunikov/spring-boot-2-kotlin-starter - Spring Boot 2.0 Kotlin application starter with configurations for Gradle, Mongo, JUnit 5 tests, logging, CircleCI and Docker compose.
1 viniciusccarvalho/kodein-cloud-functions - Provides adapters to different cloud functions providers (AWS, Azure) to run vanilla kotlin functions defined as kodein modules
0 cbedoy/DYUM - Basic Kotlin Implementation following MVP, and using Third Party library by Natural Analytics Language

Build tools ^{Back ⇈}

2299 gradle/gradle-script-kotlin - Kotlin language support for Gradle build scripts.
365 cbeust/kobalt - Build system inspired by Gradle.
161 pubref/rules_kotlin - Bazel rules for Kotlin.
51 nebula-plugins/nebula-kotlin-plugin - Provides the Kotlin plugin via the Gradle plugin portal, automatically depends on the standard library, and allows Kotlin library versions to be omitted.

Misc ^{Back ⇈}

4054 sourcerer-io/sourcerer-app - Visual profile for software engineers written in Kotlin.
2377 quicktype/quicktype - Generate Kotlin types and converters from JSON, Schema, TypeScript, and GraphQL
185 borisf/classyshark-bytecode-viewer - View your Kotlin generated classes as Java and bytecode format.
101 lice-lang/lice - A Lisp-like language's interpreter written in Kotlin
75 chrislo27/RhythmHeavenRemixEditor - An audio custom remix editor designed for the Rhythm Heaven series, using libGDX and Kotlin.
59 mkobit/jenkins-pipeline-shared-libraries-gradle-plugin - Gradle plugin to help with build and test of Jenkins Pipeline Shared Libraries.
31 kpspemu/kpspemu - Multiplatform (JS and JVM) PSP Emulator written in Kotlin.
12 brikk/brikk - Brikk dependency manager (Kotlin, KotlinJS, Java, ...).
12 jenkinsci/doktor-plugin - Jenkins plugin for automated documentation uploading to Confluence.
11 vicboma1/GameBoyEmulatorEnvironment - Front-End developed with Kotlin Experimental for my GameBoy Emulator (coroutines).
6 Poweranimal/PowerCollections - Powerfull Collections, Sets, Lists and Maps.
2 sureshg/InstallCerts - Create a PKCS12 TrustStore by retrieving server certificates.
0 neworld/gradle-jdeploy-plugin - Gradle plugin to publish JVM applications via npmjs.com

Desktop ^{Back ⇈}

13 ice1000/Dekoder - A kotlin music player, materially designed.
10 ruslanys/vkmusic - JavaFX and Spring-Boot based application for grabbing music from VK.com.

Examples ^{Back ⇈}

2336 Kotlin/kotlin-koans - Kotlin Koans are a series of exercises to get you familiar with the Kotlin Syntax.
2232 JetBrains/kotlin-examples - Various examples for Kotlin.
546 JetBrains/swot - Identify email addresses or domains names that belong to colleges or universities. Help automate the process of approving or rejecting academic discounts.
449 dkandalov/kotlin-99 - Solve 99 problems with Kotlin!
271 pakoito/FunctionalAndroidReference - A different Android app showcasing Functional Reactive Programming.
256 bmaslakov/kotlin-algorithm-club - Classic algorithms and data structures in Kotlin.
153 dodyg/Kotlin101 - 101 examples for Kotlin Programming language.
101 vicboma1/Kotlin-Koans - hese are the simple solutions of the kotlin koans online with intellij project.
86 IvanMwiruki/30-seconds-of-kotlin - Useful Kotlin snippets you can understand quickly, using only the stdlib.
29 vicboma1/GettingStartedKotlin - Learn the basics of getting started with kotlin.
24 wangjiegulu/KotlinAndroidSample - Android sample with kotlin.
16 dkandalov/rosettacode-kotlin - Repository with source code from RosettaCode
16 gyulavoros/kotlin-todomvc - Kotlin TodoMVC – full-stack Kotlin application demo
14 vicboma1/Kotlin-Examples-Problems - These are the simple solutions of the kotlin example problems online.
7 mkraynov/todomvc-react-kotlin - React Kotlin TodoMVC – example based on create-react-kotlin-app and todomvc-react
2 robfletcher/midcentury-ipsum - Swingin’ filler text for your jet-age web page.
1 robfletcher/lazybones-kotlin - The Lazybones app migrated to Kotlin as a learning exercise.

Idea Plugins ^{Back ⇈}

2312 izhangzhihao/intellij-rainbow-brackets - Rainbow Brackets / Rainbow Parentheses for IntelliJ IDEA based IDEs.
2215 intellij-rust/intellij-rust - Rust IDE built using the IntelliJ Platform.
883 Vektah/CodeGlance - Intelij IDEA plugin for displaying a code mini-map similar to the one found in Sublime.
42 dkandalov/activity-tracker - Plugin for IntelliJ IDEs to track and record user activity.

Android ^{Back ⇈}

Libraries ^{Back ⇈}

13555 Kotlin/anko - Pleasant Android application development.
2181 JakeWharton/kotterknife - View injection library for Android.
1356 DanielMartinus/Konfetti - Lightweight particle system to create realistic confetti
1297 zserge/anvil - Minimal UI library for Android inspired by React.
802 pawegio/KAndroid - Kotlin library for Android providing useful extensions to eliminate boilerplate code.
799 TradeMe/MapMe - A library that brings the adapter pattern and DiffUtil to Google Maps and MapBox.
764 duanhong169/DrawableToolbox - The missing drawable toolbox for Android.
691 nitrico/LastAdapter - Don't write a RecyclerView adapter again. Not even a ViewHolder!.
480 grandstaish/paperparcel - Boilerplate reduction library written specifically for working with Kotlin data classes on Android.
465 mcxiaoke/kotlin-koi - Koi, a lightweight kotlin library for Android Development.
420 DanielMartinus/Stepper-Touch - Fun playful Android stepper widget for counting, written in Kotlin.
397 BennyWang/KBinding - Android View Model binding framework write in kotlin, base on anko, simple but powerful.
395 zsmb13/MaterialDrawerKt - A DSL for creating Material Design navigation drawers without any XML.
388 metalabdesign/AsyncAwait - async/await for Android built upon coroutines introduced in Kotlin 1.1.
361 chibatching/Kotpref - Android SharedPreference delegation for Kotlin.
338 MarcinMoskala/ActivityStarter - Activity starter generator and arguments injection library for Android.
262 iglaweb/Ferris-Wheel - Simple android library to present an animated ferris wheel
172 nsk-mironov/kotlin-jetpack - A collection of useful extension methods for Android.
147 ragunathjawahar/kaffeine - Kaffeine is a Kotlin-flavored Android library for accelerating development.
145 ehsunshine/colored-time-selector - A smart colored time selector. Users can select just free time with a handy colorful range selector.
127 MarcinMoskala/PreferenceHolder - Kotlin Android Library, that makes preference usage in Kotlin simple and fun using object with fields binded to SharedPreferences.
124 infotech-group/android-drawable-dsl - DSL for constructing the drawables in Kotlin instead of in XML.
105 WindSekirun/RichUtilsKt - Advancement Utils for Android Developer written in Kotlin.
101 line/clay - Clay is an Android library project that provides image trimming which is originally an UI component of LINE Creators Studio.
96 denisidoro/krouter - A lightweight Android activity router.
83 TouK/bubble - Library for obtaining screen orientation when orientation is blocked in AndroidManifest.
71 WindSekirun/RxSocialLogin - This Android library is a library that provides social login for 15 platforms powered by RxJava2, Kotlin and Firebase Authentication.
45 rahulchowdhury/Mystique - A generalized adapter for RecyclerView on Android which makes it easy to add heterogeneous items to a list.
41 MarcinMoskala/KotlinPreferences - Kotlin Android Library, that makes preference usage in Kotlin simple and fun.
41 Stateful - Stateful helps you delete all the boilerplate code for saving instance state and lets you forget about saving and restoring your fragment's/activity's state.
36 costular/kotlin-android-utils - Android utilities for easier and faster Kotlin programming.
30 SnowdreamFramework/ToyBricks - Android Library that provide simpler way to achieve modularity.
28 adrielcafe/KBus - Dead simple EventBus for Android made with Kotlin and RxJava 2
28 bakhtiyork/gradients - A curated collection of splendid gradients
24 mathcamp/fiberglass - Easy lightweight SharedPreferences library for Android in Kotlin using delegated properties.
23 jupf/staticlog - StaticLog - super lightweight static logging for Kotlin, Java and Android.
21 rakshakhegde/ObservableFlow - Functional Constructs for Databinding + Kotlin + RxJava
20 inaka/KillerTask - Android AsyncTask wrapper library, written in Kotlin.
15 adrielcafe/KrumbsView - The ultimate breadcrumbs view for Android!.
12 adrielcafe/AndroidCoroutineScopes - This lib implements the most common CoroutineScopes used in Android apps.
11 yundom/kache - A lightweight cache library written in Kotlin.
9 0xe1f/KotX - Kotlin extension and tool library for Android
9 andre-artus/AnvilKotlin - Minimal UI library for Android inspired by React.
8 Jintin/MixAdapter - Compose multiple Adapter for RecyclerView in Android.
8 programmerr47/ganalytics - A tiny api layer for any analytics in application.
3 GlimpseFramework/glimpse-framework-android - OpenGL made simple.
2 hpost/RxBrainwaves - RxJava wrapper for NeuroSky MindWave headsets.
2 yundom/RxVan - A lightweight event bus written in Kotlin and RxJava.
1 calintat/alps - Android library for preferences which includes property delegates and a custom DSL for definining preferences.

Frameworks ^{Back ⇈}

1476 nekocode/kotgo - An android development framwork on kotlin using MVP architecture.
836 codenameone/CodenameOne - 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
33 lightningkite/kotlin-core - A full framework for making Android apps. Based on Anko and Kotson.
23 Rasalexman/Flair - Powerful android architecture framework based on MVC pattern without fragments and activities with events system, view backstack and simple lifecycle. Clean Architecture
3 hpost/kommon-mvi - Minimal framework for Model View Intent inspired Android applications written in Kotlin.

Projects ^{Back ⇈}

2732 inorichi/tachiyomi - Free and open source manga reader for Android.
2085 antoniolg/Kotlin-for-Android-Developers - Companion App for the book "Kotlin Android Developers".
1822 TwidereProject/Twidere-Android - Material Design ready and feature rich Twitter app for Android 4.0+
1703 antoniolg/Bandhook-Kotlin - A showcase music app for Android entirely written using Kotlin language.
1535 SimpleMobileTools/Simple-Calendar - A simple calendar with events, customizable widget and no ads.
697 SimpleMobileTools/Simple-Gallery - A gallery for viewing photos and videos without ads.
531 damianpetla/kotlin-dagger-example - Example of Android project showing integration with Kotlin and Dagger 2.
311 dodyg/AndroidRivers - RSS Readers for Android.
301 SimpleMobileTools/Simple-File-Manager - A simple file manager for browsing and editing files and directories.
287 SimpleMobileTools/Simple-Camera - A camera with flash, zoom and no ads.
194 SidneyXu/AndroidDemoIn4Languages - Comparison between Java, Groovy, Scala, Kotlin in Android Development.
185 SimpleMobileTools/Simple-Notes - A simple textfield for adding quick notes without ads.
145 SimpleMobileTools/Simple-Draw - A canvas you can draw on with different colors.
94 AllanWang/KAU - An extensive collection of Kotlin Android Utils
83 hanjoongcho/aaf-easydiary - This is a diary application optimized to user experience.
61 Karumi/KataScreenshotKotlin - An full exercise to learn how to create screenshot tests for Android
59 ziggy42/Blum-kotlin - A simple android Twitter client written in Kotlin
57 mustafaberkaymutlu/uv-index - A simple ultraviolet index viewer app for demonstrating Instant Apps + Kotlin + Dagger + MVP
54 Karumi/KataSuperHeroesKotlin - A full exercise to learn how to create espresso tests using test doubles and a dependency injector for Android written in Kotlin.
42 Karumi/KataContactsKotlin - An exercise to learn how to write software based on Clean Architecture using Kotlin.
42 Karumi/KataTODOApiClientKotlin - A full exercise to learn how to use stubbing HTTP in Kotlin.
36 Karumi/MaxibonKataKotlin - A ready to use playground to learn how to write tests using property-based testing in Kotlin.
28 inaka/kotlillon - Android Kotlin Examples.
21 RxKotlin/Pocket - This app help user to save links easily, and can export to Evernote as weekly.
19 MakinGiants/todayhistory - App that shows what happened today in history.
19 hanjoongcho/aaf-easyphotomap - This is a photomap app that shows photos taken on a map.
11 hanjoongcho/aaf-easypassword - A password manager using a single lock pattern for various type passwords management.
10 massivedisaster/AFM - An library to help android developers working easly with activities and fragments with Kotlin
7 MakinGiants/banjen - Android app to help to tune a banjo.
7 adrielcafe/ChromaAndroidApp - Chromatic tuner app.
6 ahong222/happy21 - A simple game of Black-Jack write with kotlin
1 WilderPereira/ftwfy - 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.
1 WilderPereira/lmgtfyGen - Simple Android App to generate Let Me Google That For You urls.
1 adrielcafe/GreenHellCompanionApp - Unofficial companion app for the game Green Hell.
1 inshiro/Kitvei - Free and open source Bible for Android

Extensions ^{Back ⇈}

139 ajalt/timberkt - Easy Android logging with Kotlin and Timber.
18 rosariopfernandes/fireXtensions - Unofficial Kotlin Extensions for the Firebase Android SDK.

Tools ^{Back ⇈}

812 kiruto/debug-bottle - Debug Bottle is an Android runtime debug / develop tools written using kotlin language.

Tests ^{Back ⇈}

662 agoda-com/Kakao - Nice and simple DSL for Espresso in Kotlin.

Kotlin JavaScript ^{Back ⇈}

JavaScript ^{Back ⇈}

973 Kotlin/kotlin-fullstack-sample - Kotlin Full-stack Application Example.
270 andrewoma/reakt - Reakt is a Kotlin wrapper for facebook's React library.
94 nosix/vue-kotlin - Libraries and tools supporting the use of Vue.js in Kotlin
90 rjaros/kvision - Object oriented Web UI framework for Kotlin/JS
61 danfma/kodando - Kotlin JS bindings and libraries.
60 pixijs/pixi-native - The aim of this project is to provide a fast lightweight 2D library that works across all devices.
31 Kabbura/Kunafa - Easy to use, high level framework in Kotlin for front-end web-development and creating web apps without using HTML, CSS, or JavaScript.
26 shafirov/klogging - Kotlin logging, both js and jvm.
24 markaren/three.kt - Kotlin wrappers for three.js JavaScript 3D library
13 stangls/kotlin-js-jquery - A small framework for writing client -side web -applications in Kotlin.
5 kengorab/kotlin-javascript-boilerplate - An extremely barebones boilerplate project for compiling Kotlin to Javascript.

Frontend ^{Back ⇈}

62 olegcherr/Aza-Kotlin-CSS - Kotlin DSL for CSS

Game Development ^{Back ⇈}

18 perses-games/kudens - Develop browser games in Kotlin

Build Tools ^{Back ⇈}

516 Kotlin/kotlin-frontend-plugin - Gradle Kotlin plugin for frontend development.
26 huston007/kotlin-loader - Kotlin webpack loader.

Integration ^{Back ⇈}

284 kotlin/ts2kt - Converter of TypeScript definition files to Kotlin declarations (stubs).

Kotlin Native ^{Back ⇈}

Projects ^{Back ⇈}

5548 JetBrains/kotlin-native - Kotlin/Native is a LLVM backend for the Kotlin compiler, runtime implementation and native code generation facility using LLVM toolchain.
489 JetBrains/kotlinconf-spinner - Simple spinner-like game intended to demonstrate capabilities of Kotlin/Native software stack.
15 perses-games/konan-sfml - Kotlin native with SFML example