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

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Links ^{Back ⇈}

Resources ^{Back ⇈}

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

Books and Courses ^{Back ⇈}

Kotlin in Action - Dmitry Jemerov, Svetlana Isakova
Kotlin for Android Developers - Antonio Leiva
Programming Kotlin - Stephen Samuel, Stefan Bocutiu
Fundamental Kotlin, First Edition - Learn Kotlin quickly from the start
Kotlin for Java Developers - 160-minute Android Course.
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 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
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
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 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

Libraries/Frameworks ^{Back ⇈}

Web ^{Back ⇈}

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

Tests ^{Back ⇈}

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

Dependency Injection ^{Back ⇈}

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

Coroutines ^{Back ⇈}

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

Functional Programming ^{Back ⇈}

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

JSON ^{Back ⇈}

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

Database ^{Back ⇈}

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

Tools ^{Back ⇈}

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

Desktop ^{Back ⇈}

edvin/tornadofx - Lightweight JavaFX Framework for Kotlin/

Http Clients ^{Back ⇈}

kittinunf/Fuel - The easiest HTTP networking library for Kotlin/Android.
jkcclemens/khttp - Kotlin HTTP requests library.
egorzhdan/networkinkt - Multiplatform coroutine-based HTTP client.
rybalkinsd/kohttp - Kotlin DSL-based HTTP client.

Editors ^{Back ⇈}

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

Syntax Highlighters ^{Back ⇈}

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

Game Development ^{Back ⇈}

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

Misc ^{Back ⇈}

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

Extensions ^{Back ⇈}

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

Configuration ^{Back ⇈}

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

Graphics ^{Back ⇈}

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

Data Science ^{Back ⇈}

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

Command Line Interface ^{Back ⇈}

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

Browsers ^{Back ⇈}

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

Projects ^{Back ⇈}

Web ^{Back ⇈}

sdeleuze/spring-boot-kotlin-demo - Basic Spring Boot app in Kotlin.
IRus/kotlin-dev-proxy - Simple server for proxy requests and host static files written in Kotlin, Spark Java and Apache HttpClient.
ratpack/example-ratpack-gradle-kotlin-app - An example of a Kotlin Ratpack app built with Gradle.
mariomac/codebuilder - Demo app about asynchronous architectures for long-response-time web applications.
cbedoy/DYUM - Basic Kotlin Implementation following MVP, and using Third Party library by Natural Analytics Language
eddywm/KTFLITE - Computer Vision on Android with Kotlin and Tensorflow Lite.
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.
ivanpopelyshev/vertx-facebook-messenger - Seed project for facebook messenger bots. Vertx, Kotlin.
corda/corda - Corda is a distributed ledger platform designed to record, manage and automate legal agreements between business partners.
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.
mixitconf/mixit - MiXiT website
derveloper/kiny - Your super simple private serverless service running your kotlin functions like AWS lambda.
ssouris/petclinic-spring5-reactive - Spring 5 Reactive Petclinic app written in Kotlin.
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.
viniciusccarvalho/kodein-cloud-functions - Provides adapters to different cloud functions providers (AWS, Azure) to run vanilla kotlin functions defined as kodein modules

Build tools ^{Back ⇈}

cbeust/kobalt - Build system inspired by Gradle.
gradle/gradle-script-kotlin - Kotlin language support for Gradle build scripts.
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.
pubref/rules_kotlin - Bazel rules for Kotlin.

Misc ^{Back ⇈}

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

Desktop ^{Back ⇈}

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

Examples ^{Back ⇈}

Kotlin/kotlin-koans - Kotlin Koans are a series of exercises to get you familiar with the Kotlin Syntax.
JetBrains/kotlin-examples - Various examples for Kotlin.
JetBrains/swot - 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 - Swingin’ filler text for your jet-age web page.
robfletcher/lazybones-kotlin - The Lazybones app migrated to Kotlin as a learning exercise.
wangjiegulu/KotlinAndroidSample - Android sample with kotlin.
dodyg/Kotlin101 - 101 examples for Kotlin Programming language.
dkandalov/kotlin-99 - Solve 99 problems with Kotlin!
dkandalov/rosettacode-kotlin - Repository with source code from RosettaCode
vicboma1/Kotlin-Koans - hese are the simple solutions of the kotlin koans online with intellij project.
vicboma1/GettingStartedKotlin - Learn the basics of getting started with kotlin.
vicboma1/Kotlin-Examples-Problems - These are the simple solutions of the kotlin example problems online.
pakoito/FunctionalAndroidReference - A different Android app showcasing Functional Reactive Programming.
bmaslakov/kotlin-algorithm-club - Classic algorithms and data structures in Kotlin.
gyulavoros/kotlin-todomvc - Kotlin TodoMVC – full-stack Kotlin application demo
mkraynov/todomvc-react-kotlin - React Kotlin TodoMVC – example based on create-react-kotlin-app and todomvc-react
IvanMwiruki/30-seconds-of-kotlin - Useful Kotlin snippets you can understand quickly, using only the stdlib.

Idea Plugins ^{Back ⇈}

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

Android ^{Back ⇈}

Libraries ^{Back ⇈}

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

Frameworks ^{Back ⇈}

nekocode/kotgo - An android development framwork on kotlin using MVP architecture.
lightningkite/kotlin-core - A full framework for making Android apps. Based on Anko and Kotson.
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
Rasalexman/Flair - Powerful android architecture framework based on MVC pattern without fragments and activities with events system, view backstack and simple lifecycle. Clean Architecture

Projects ^{Back ⇈}

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

Extensions ^{Back ⇈}

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

Tools ^{Back ⇈}

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

Tests ^{Back ⇈}

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

Kotlin JavaScript ^{Back ⇈}

JavaScript ^{Back ⇈}

andrewoma/reakt - Reakt is a Kotlin wrapper for facebook's React library.
pixijs/pixi-native - The aim of this project is to provide a fast lightweight 2D library that works across all devices.
shafirov/klogging - Kotlin logging, both js and jvm.
stangls/kotlin-js-jquery - A small framework for writing client -side web -applications in Kotlin.
Kotlin/kotlin-fullstack-sample - Kotlin Full-stack Application Example.
danfma/kodando - Kotlin JS bindings and libraries.
kengorab/kotlin-javascript-boilerplate - An extremely barebones boilerplate project for compiling Kotlin to Javascript.
markaren/three.kt - Kotlin wrappers for three.js JavaScript 3D library
rjaros/kvision - Object oriented Web UI framework for Kotlin/JS
nosix/vue-kotlin - Libraries and tools supporting the use of Vue.js in Kotlin
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.

Frontend ^{Back ⇈}

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

Game Development ^{Back ⇈}

perses-games/kudens - Develop browser games in Kotlin

Build Tools ^{Back ⇈}

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

Integration ^{Back ⇈}

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

Kotlin Native ^{Back ⇈}

Projects ^{Back ⇈}

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