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

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Links ^{Back ⇈}

Resources ^{Back ⇈}

/r/Kotlin
Stackoverflow Documentation on Kotlin
Quora Kotlin
Trending Kotlin on Github
Antonio Leiva - Android and any other monsters
LinkedIn: Kotlin Developers (Join!)
Kotlin - Google+
From Java To Kotlin
dbacinski/Design-Patterns-In-Kotlin - Design Patterns implemented in Kotlin.
Kotlin Cheat Sheet

Books and Courses ^{Back ⇈}

Kotlin in Action - Dmitry Jemerov, Svetlana Isakova
Kotlin for Android Developers - Antonio Leiva
Programming Kotlin - Stephen Samuel, Stefan Bocutiu
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

Libraries/Frameworks ^{Back ⇈}

Web ^{Back ⇈}

Kotlin/ktor - Web backend framework for Kotlin.
TinyMission/kara - Web framework written in Kotlin.
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.
sdeleuze/spring-kotlin - Kotlin extensions for Spring projects.
Kotlin/kotlinx.coroutines - Libraries built upon Kotlin coroutines.
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

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.
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.
raniejade/kspec - Kotlin Specification Framework.
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.

Dependency Injection ^{Back ⇈}

SalomonBrys/Kodein - Painless Kotlin Dependency Injection .
kailan/kodeinject - Constructor dependency injection for Kodein
kohesive/injekt - (Deprecated, @see Kodein) Dependency Injection / Object Factory for Kotlin

Functional Programming ^{Back ⇈}

MarioAriasC/funKTionale - Functional constructs for Kotlin.
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
pakoito/Komprehensions - Do comprehensions for Kotlin and 3rd party libraries.
h0tk3y/kotlin-monads - Monads 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.
fboldog/ext4klaxon - Type Extensions (Long, Int, Enum, Date) for Klaxon.
Jire/KTON - Object notation in pure Kotlin!

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.

Tools ^{Back ⇈}

Kotlin/dokka - Documentation Engine for Kotlin.
Levelmoney/kbuilders - KBuilders turns your Java builders into beautiful Type-Safe Builders.
holgerbrandl/kscript - Scripting utils for Kotlin.
shyiko/ktlint - Kotlin linter.
jtransc/jtransc - JVM AOT compiler created in Kotlin.
arturbosch/detekt - Static code analysis for Kotlin.
ligee/kotlin-jupyter - Kotlin kernel for Jupyter/iPython.

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.

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.

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.

Game Development ^{Back ⇈}

czyzby/ktx - Kotlin utilities for LibGDX applications.
AlmasB/FXGL - JavaFX 8 Game Library written in Java + 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.
leprosus/kotlin-cli - Kotlin-CLI - command line interface options parser 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.
elect86/kotlin-unsigned - Boxed unsigned support, Ubyte, Uint, Ulong and Ushort.
Jire/Strukt - Value types on the JVM, today!
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
jimschubert/kopper - A simple Kotlin option parser
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.

Extensions ^{Back ⇈}

Kotlin/kotlinx.support - Extension and top-level functions to use JDK7/JDK8 features in Kotlin 1.0.

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

Graphics ^{Back ⇈}

elect86/glm - Porting of cpp g-truck glm, opengl math lib
elect86/ovr - Oculus binding
elect86/openvr - Openvr binding
elect86/kt - gli, port of cpp g-truck gli, texture util
java-graphics/assimp - Java Open Asset Import Library

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.
bashor/ts2kt - Converter of TypeScript definition files to Kotlin declarations (stubs)
shafirov/klogging - Kotlin logging, both js and jvm.

Frontend ^{Back ⇈}

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

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.
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.

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 ⇈}

brikk/brikk - Brikk dependency manager (Kotlin, KotlinJS, Java, ...).

Desktop ^{Back ⇈}

ice1000/Dekoder - A kotlin music player, materially designed.

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.
sanity/pairAdjacentViolators - A Kotlin implementation of the Pair Adjacent Violators algorithm for isotonic regression.

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.

Android ^{Back ⇈}

Libraries ^{Back ⇈}

Kotlin/anko - Pleasant Android application development.
JakeWharton/kotterknife - View injection library for Android.
MarcinMoskala/ActivityStarter - Activity starter generator and arguments injection library for Android.
MarcinMoskala/KotlinPreferences - Kotlin Android Library, that makes preference usage simple and fun.
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.
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.
graknol/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.

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.

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-banjo-tuner - App that plays sounds helping to tune a brazilian 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