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• Awesome Kotlin Jobs - A curated list of companies using Kotlin
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• Kotlin Guide - An introduction to Kotlin
• Kotlin Quiz - Are You a Kotlin Expert? Test Your Skills with the Kotlin Quiz!
• Kotlin syntax cheat sheet
• Kotlin Standard Functions cheat-sheet - Learn how to use kotlin's standard library with lambda functions
• AlexeySoshin/Hands-on-Design-Patterns-with-Kotlin - Code examples for 'Hands-on Design Patterns with Kotlin' book
• From Java To Kotlin - From Java to Kotlin Cheat Sheet
• dbacinski/Design-Patterns-In-Kotlin - Design Patterns implemented in Kotlin

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

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

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

• welvet/summer - Lightweight Jetty/JDBC wrapper library inspired by SparkJava and MyBatis with DI and Testing support for Kotlin
• laviua/komock - HTTP/Consul/SMTP/Spring Config mocker framework written in Kotlin
• AurityLab/graphql-kotlin-toolkit - GraphQL toolkit for Kotlin (includes code generator and spring boot integration)
• bootique/bootique-kotlin - Provides extension function and features for smooth development with Bootique and Kotlin.
• phenax/h - HTML templating library written in Kotlin
• moia-dev/lambda-kotlin-request-router - A REST request routing layer for AWS lambda handlers written in Kotlin
• darkredz/zeko-restapi-framework - Asynchronous web framework for Kotlin. Create REST APIs in Kotlin easily with automatic Swagger/OpenAPI doc generation
• Ahoo-Wang/CoSec - RBAC-based And Policy-based Multi-Tenant Security Framework.
• celtric/kotlin-html - A library to generate HTML in Kotlin.
• sepatel/tekniq - Full-feature HTTP DSL Framework, HTTP Client, JDBC DSL, Loading Cache and Configuration
• spypunk/sponge - A website crawler and links downloader command line tool written in Kotlin
• Ahoo-Wang/Wow - A Modern Reactive CQRS Architecture Microservice development framework based on DDD and EventSourcing.
• danneu/kog - A web framework focused on simplicity, middleware, and functional composition
• gimlet2/kottpd - REST framework in pure Kotlin, inspired by spark-java
• ButterCam/sisyphus - Modern gRPC service framework based on Kotlin/Spring Boot with Message DSL/HTTP transcoding/Google AIP support.
• jean79/yested - A Kotlin framework for building web applications in Javascript.
• MarioAriasC/KotlinPrimavera - Spring support libraries for Kotlin.
• brianmadden/krawler - A web crawling framework written in Kotlin
• taskworld/kraph - GraphQL request string builder written in Kotlin
• kohesive/kovert - An invisible, super easy and powerful REST and Web framework over Vert.x or Undertow.
• mvysny/vaadin-on-kotlin - A simple way to write full-stack database-backed component-oriented web apps
• alpas/alpas - Kotlin web framework inspired by Laravel/Rails. Easy, elegant and productive.
• aPureBase/KGraphQL - A GraphQL implementation written in Kotlin
• vert-x3/vertx-lang-kotlin - This module provides Kotlin language bindings including DSL and extension functions for vert.x 3
• hypercube1024/firefly - An asynchronous web framework for rapid development of high-performance web application.
• SeunAdelekan/Kanary - A micro webframework for Kotlin
• TinyMission/kara - Web framework written in Kotlin.
• hexagonkt/hexagon - A Microservices framework that takes care of HTTP, serialization and storage.
• nacular/doodle - A pure Kotlin UI framework for the Web (and Desktop)
• hhariri/wasabi - An HTTP Framework built with Kotlin for the JVM.
• jwstegemann/fritz2 - small lib to build reactive web-apps in pure Kotlin based on Flows
• varabyte/kobweb - A modern framework for full stack web apps in Kotlin
• kwebio/kweb-core - Build rich live-updating web apps in pure server-side Kotlin.
• perwendel/spark-kotlin - A DSL in idiomatic Kotlin for the Spark web framework.
• jetbrains/kotless - Kotlin serverless framework reducing the routine of serverless deployment.
• Kotlin/kotlinx.html - Kotlin DSL for HTML.
• jooby-project/jooby - Modular micro web framework for Java and Kotlin
• ExpediaDotCom/graphql-kotlin - Code-only GraphQL schema generation for Kotlin
• http4k/http4k - Toolkit for serving and consuming HTTP services in a functional and consistent way.
• apollographql/apollo-android - Typesafe GraphQL client for the JVM and Kotlin native
• tipsy/javalin - A Simple REST API Library for Java/Kotlin.
• ktorio/ktor - Web backend framework for Kotlin. Easy to use, fun and asynchronous.

• KennethWussmann/mock-fuel - JUnit 5 extension to easily mock external HTTP requests made with the HTTP client Fuel.
• iotacb/ChefkochAPI - Kotlin/Java library, to parse and get information of recipes from chefkoch
• krzema12/vis-assert - Test the shape of your functions!
• dmcg/k-sera - A JMock wrapper for Kotlin.
• neworld/kupiter - Kotlin DSL for Junit5
• willowtreeapps/opentest4k - kotlin multiplatform implementation/bindings of opentest4j
• HelloCuriosity/model-forge - A Kotlin library for auto generating models for tests.
• from-source/kiwi - Fluent assertions library with support of json path.
• mvysny/DynaTest - Write your tests in DSL way. Runs on JUnit5 Platform.
• dmcg/konsent - An acceptance test library for Kotlin.
• EranBoudjnah/RandomGenKt - Initialize instances of any class with generated data.
• dam5s/aspen - Aspen is an RSpec and Spek inspired test runner for Kotlin.
• EranBoudjnah/TestIt - Generate unit testing boilerplate from kotlin files.
• tyro/arbitrater - Arbitrater is a library for creating arbitrary (randomized) instances of classes by reflection for use in testing.
• qwertukg/SeleniumBuilder - DSL for Selenium 2.0. Provide a possibility to write tests in Kotlin builder style.
• Trendyol/stove4k - The easiest way of writing e2e tests for your back-end API with all physical dependencies in Kotlin.
• permissions-dispatcher/kompile-testing - Testing tools for kotlinc and kapt.
• EPadronU/balin - Balin is a browser automation library for Kotlin. It's basically a Selenium-WebDriver wrapper library inspired by Geb.
• xgouchet/Elmyr - A utility to make Kotlin/Java tests random yet reproducible
• dmcg/minutest - Simple, Expressive, Extensible Testing for Kotlin on the JVM
• karumi/KotlinSnapshot - Verify your data with snapshot testing.
• winterbe/expekt - BDD assertion library for Kotlin.
• codecentric/hikaku - A library that tests if the implementation of a REST-API meets its specification.
• sokomishalov/skraper - Kotlin/Java library, cli tool and telegram-bot for scraping posts and media from various sources with neither authorization nor full page rendering (Facebook, Instagram, Twitter, Youtube, Tiktok, Telegram, Twitch, Reddit, Pinterest, Flickr, Tumblr, etc.)
• serpro69/kotlin-faker - Port of ruby faker gem written in kotlin
• npryce/hamkrest - A reimplementation of Hamcrest to take advantage of Kotlin language features.
• Kotlin/kotlinx-benchmark - A powerful library for benchmarking in Kotlin.
• Ninja-Squad/springmockk - SpringMockK: MockBean and SpyBean, but for MockK instead of Mockito
• robstoll/atrium - Multiplatform assertion library for Kotlin supporting i18n.
• robfletcher/strikt - An assertion library for Kotlin
• tschuchortdev/kotlin-compile-testing - A library for testing Kotlin and Java annotation processors, compiler plugins and code generation
• willowtreeapps/assertk - assertions for kotlin inspired by assertj
• skrapeit/skrape.it - A DSL-driven HTML/XML parser-library that enables meaningful testing of rendered HTML templates.
• MarkusAmshove/Kluent - Fluent Assertion-Library for Kotlin.
• JetBrains/spek - A specification framework for Kotlin.
• nhaarman/mockito-kotlin - Using Mockito with Kotlin.
• kotest/kotest - Formerly known as KotlinTest, Kotest is a flexible and comprehensive testing tool that is multiplatform enabled.
• mockk/mockk - Pure Kotlin mocking library.

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

• Rasalexman/KODI - light-weight KOtlin Dependency Injection Framework with or without reflection module without kapt
• JLLeitschuh/kotlin-guiced - Convenience Kotlin API over the Google Guice DI Library.
• authzee/kotlin-guice - Guice DSL extensions for Kotlin
• sergeshustoff/dikt - Simple and powerful DI for kotlin multiplatform
• corbella83/PopKorn - Forget about modules and components. DI can be simple
• evant/kotlin-inject - Dependency injection lib for kotlin
• Kodein-Framework/Kodein-DI - Painless Kotlin Dependency Injection.
• Ekito/koin - A functional Kotlin dependency injection framework for Android and JVM.

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

• poetix/klenses - Lenses 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
• fork-handles/result4k - Result monad for type safe error handling in Kotlin
• pardom/redux-kotlin - Direct port of Redux for Kotlin.
• RubyLichtenstein/RxTest - Kotlin DSL for testing RxJava2
• arrow-kt/arrow-meta - Functional companion to Kotlin's Compiler.
• brianegan/bansa - A state container for Kotlin & Java, inspired by Elm & Redux.
• michaelbull/kotlin-result - A Result monad for modelling success or failure operations - inspired by Elm, Rust, & Haskell.
• kittinunf/Result - The modelling for success/failure of operations in Kotlin.
• reactor/reactor-core - Non-Blocking Reactive Streams Foundation for the JVM. Natively supports Kotlin, since 3.1.0.M3.
• arrow-kt/arrow - Functional companion to Kotlin's Standard Library.
• ReactiveX/RxKotlin - RxJava bindings for Kotlin.

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

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

• Ganet/rxaerospike - RxJava2 wrapper for aerospike-client-java.
• 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.
• KotlinPorts/kt-postgresql-async - Kotlin/Gradle port of mauricio's async driver for postgres/mysql.
• 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 Reactive Streams Java Driver
• bloomberg/selekt - Android SQL database library wrapping the community edition of SQLCipher, an SQLite extension that provides 256-bit AES encryption. Selekt realises the maximum concurrency offered by SQLite3.
• coupang/spring-data-requery - Spring Data for Requery (lightweight ORM)
• darkredz/Zeko-SQL-Builder - Zeko SQL Builder is a high-performance lightweight SQL query library written for Kotlin language
• ctripcorp/SQLlin - A DSL SQLite library for Kotlin Multiplatform
• seratch/kotliquery - A handy database access library in Kotlin.
• andrewoma/kwery - Kwery is an SQL library for Kotlin.
• komapper/komapper - Komapper is an ORM library for server-side Kotlin with JDBC and R2DBC support.
• cheptsov/kotlin-nosql - NoSQL database query and access library for Kotlin.
• consoleau/kotlin-jpa-specification-dsl - This library provides a fluent DSL for querying spring data JPA repositories using spring data Specifications.
• TouK/krush - Idiomatic persistence layer for Kotlin, based on Exposed. It’s based on a compile-time JPA annotation processor that generates Exposed DSL table and objects mappings from your data classes.
• dizitart/nitrite-database - Potassium Nitrite is a kotlin extension of nitrite database, an open source nosql embedded document store with mongodb like api.
• Litote/kmongo - KMongo - Kotlin toolkit for Mongo
• JetBrains/xodus - Transactional schema-less embedded database used by JetBrains YouTrack and JetBrains Hub.
• ebean-orm/ebean - Ebean is a Java & Kotlin ORM including type safe kotlin queries
• jasync-sql/jasync-sql - Kotlin port of mauricio's async driver for postgres/mysql.
• kotlin-orm/ktorm - A lightweight ORM Framework for Kotlin. Provides strong-typed and flexible SQL DSL and convenient sequence APIs to reduce our duplicated effort on database operations.
• requery/requery - Modern SQL based query & persistence for Java/Kotlin/Android.
• 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.
• Raizlabs/DBFlow - A blazing fast, powerful, and very simple ORM android database library that writes database code for you.
• square/sqldelight - Generates Java models from CREATE TABLE statements.
• JetBrains/Exposed - Exposed is a prototype for a lightweight SQL library written over JDBC driver for Kotlin language.

• L-Briand/TT - A powerful key:value template processor.
• Vorlonsoft/EasyDokkaPlugin - Gradle Script plugin to generate documentation by Dokka for Kotlin and Java, Android and non-Android projects.
• cypressious/KotlinW - A small wrapper for the Kotlin compiler that can be used to execute .kts scripts.
• Vorlonsoft/GradleMavenPush - Gradle Script plugin to upload Gradle Android/Kotlin/Java Artifacts to Maven repositories (JCenter, Maven Central, ...).
• kohesive/keplin - Secure Kotlin scripting and binary lambda-scripts.
• mkohm/detekt-hint - Detection of design principle violations as a plugin to detekt.
• s1monw1/KtsRunner - Library for executing .kts files from regular Kotlin code using Java Scripting Engines API
• krzema12/github-actions-kotlin-dsl - Authoring GitHub Actions workflows in Kotlin.
• saveourtool/diktat - Strict coding standard for Kotlin and a custom set of rules for detecting and autofixing code smells.
• SonarSource/sonarlint-intellij - An IDE extension that helps you detect and fix quality issues as you write code.
• Kotlin/kotlin-interactive-shell - Kotlin Language Interactive Shell
• facebookincubator/ktfmt - Kotlin code formatter that reflows lines and always produces the same result.
• Kotlin/kotlinx-kover - Gradle plugin for Kotlin code coverage agents.
• jmfayard/refreshVersions - Better Gradle dependencies management inside the IDE. Search for available updates.
• holgerbrandl/kscript - Scripting utils for Kotlin.
• Kotlin/dokka - Documentation Engine for Kotlin.
• detekt/detekt - Static code analysis for Kotlin.
• pinterest/ktlint - An anti-bikeshedding Kotlin linter with built-in formatter.

• aafanasev/sekret - Kotlin compiler plugin to exclude secret properties from toString() of Data class
• AhmedMourad0/no-copy - A Kotlin compiler plugin that performs 'copy-erasure' on data classes.
• google/ksp - Kotlin Symbol Processing API

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

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

• edvin/tornadofx - Lightweight JavaFX Framework for Kotlin/

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

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

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

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

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

• themichailov/kache - Kotlin functions caching library, reducing count of function executions.
• d-max/dsl-logger - Simple DSL for logging with logger abstraction layer
• mobiletoly/urlsome - URL builder library for Kotlin
• Ahoo-Wang/CoCache - Level 2 Distributed Coherence Cache Framework
• InsanusMokrassar/KSLog - Fully customizable and lightweight logging library for Kotlin
• JoelW-S/groothy - Kotlin implementation of Groovy Truth.
• sandjelkovic/kxjtime - Lightweight Kotlin extensions for java.time API
• RationalityFrontline/kevent - A powerful in-process event dispatcher based on Kotlin and Coroutines.
• DragonKnightOfBreeze/breeze-framework - Integrated code framework base on Kotlin, provide many useful extensions for standard library and some frameworks.
• pearxteam/kpastebin - Multiplatform Kotlin library to interact with the pastebin.com API
• Lewik/klog - Minimalistic and multiplatform logging for Kotlin
• lpicanco/krate - Krate is a rate limiter library designed specifically for Kotlin applications. In memory, Redis and Caffeine support.
• Ahoo-Wang/Simba - Distributed lock service
• nickhristov/krakdown - A native markdown parser written in Kotlin.
• saschpe/log4k - Lightweight logging library for Kotlin/Multiplatform. Supports Android, iOS, JavaScript and plain JVM environments.
• ssuukk/Qotlin - IBM Q Experience Kotlin toolkit - Kotlin library to interact and write assembly code for IBM Quantum computers
• dotCipher/kase-format - String case conversion and detection library
• fluidsonic/fluid-pdf - Easy PDF generation with HTML & CSS using Chromium or Google Chrome
• spoptchev/kotlin-preconditions - Precondition error checking in kotlin.
• mplatvoet/progress - Progress for Kotlin.
• DavidMellul/Kotlin-Publish-Subscribe - Intuitive and powerful human-readable Kotlin DSL for IPCs & turning anything into a message receiver / broadcaster
• sargunster/KtUnits - Tiny unit conversion library for Kotlin.
• vittee/kformula - Mathematical expression engine written in Kotlin, running on JVM.
• MiloszKrajewski/stateful4k - State Machine Construction Kit for Kotlin
• jershell/kbson - Bson support for kotlinx.serialization
• evoasm/kasm - x64/x86-64 assembler and execution library
• czyzby/kotlin-times - A simple utility library for readable loops.
• kryptokrona/kryptokrona-kotlin-sdk - Kryptokrona SDK in Kotlin for building decentralized private communication and payment systems.
• cesarferreira/kotlin-pluralizer - Kotlin extension to pluralize and singularize strings.
• z4kn4fein/kotlin-semver - Semantic Versioning library for Kotlin Multiplatform.
• aminography/PrimeCalendar - Provides all of the java.util.Calendar functionalities for Civil, Persian, Hijri, Japanese, etc, as well as their conversion to each other.
• Rasalexman/KDispatcher - Simple and light-weight event dispatcher for Kotlin
• justwrote/kjob - A coroutine based persistent background scheduler written in Kotlin.
• ziggy42/kolor - A library to print colored strings, with Kotlin.
• Jire/Strukt - Value types on the JVM, today!
• s1monw1/TLSLibrary - Simple TlsLibrary written in Kotlin - Provides DSL for creating TLS connections
• pearxteam/kasechange - Multiplatform Kotlin library to convert strings between various case formats including Camel Case, Snake Case, Pascal Case and Kebab Case
• vjames19/kotlin-futures - A collections of extension functions to make the JVM Future, CompletableFuture, ListenableFuture API more functional and Kotlin like.
• debop/koda-time - Joda Time Extensions in Kotlin. (From Java 8 use java.time instead)
• KotUniL - KotUniL: Kotlin function and objects for working with SI units like meter, second, as well as currencies and general units like percent.
• ivanisidrowu/KtRssReader - Kotlin library for parsing RSS feeds
• vendelieu/telegram-bot - A lightweight, feature-rich wrapper for the Telegram Bot API
• spoptchev/scientist - A kotlin library for refactoring code. Port of GitHub's scientist.
• kunalsheth/units-of-measure - A type-safe dimensional analysis library for Kotlin.
• 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.
• kohesive/solr-undertow - Solr Standalone Tiny and High performant server.
• consoleau/kassava - This library provides some useful kotlin extension functions for implementing toString() and equals() without all of the boilerplate.
• leprosus/kotlin-hashids - Library that generates short, unique, non-sequential hashes from numbers.
• TicketmasterMobileStudio/actions-on-google-kotlin - Port of official Node.js SDK to Kotlin. Complete with all features and tests and nearly identical API.
• kohesive/klutter - A mix of random small libraries for Kotlin, the smallest reside here until big enough for their own repository.
• Kotlin/kotlinx.reflect.lite - Lightweight library allowing to introspect basic stuff about Kotlin symbols.
• krud-dev/shapeshift - A Kotlin library for intelligent object mapping and conversion between objects.
• fork-handles/tuples4k - Tuple classes
• MehdiK/Humanizer.jvm - Humanizer.jvm meets all your jvm needs for manipulating and displaying strings, enums, dates, times, timespans, numbers and quantities.
• holgerbrandl/kravis - A Kotlin grammar for scientific data visualization
• just-ai/jaicf-kotlin - Kotlin framework for conversational voice assistants and chatbots development.
• touchlab/KMMBridge - KMMBridge is a set of Gradle tooling that facilitates publishing and consuming pre-built KMM (Kotlin Multiplatform Mobile) Xcode Framework binaries.
• yole/kxdate - Kotlin extensions for Java 8 java.time API
• insanusmokrassar/TelegramBotAPI - Kotlin Multiplatform library for type-safe work with Telegram Bot API
• oolong-kt/oolong - Elm inspired Model-View-Update (MVU) implementation for Kotlin multiplatform.
• hotchemi/khronos - An intuitive Date extensions in Kotlin.
• charleskorn/kaml - YAML support for kotlinx.serialization
• doyaaaaaken/kotlin-csv - A pure kotlin simple csv reader/writer.
• cretz/asmble - Compile WebAssembly to JVM and other WASM tools.
• pemistahl/lingua - A language detection library suitable for long and short text alike
• pmwmedia/tinylog - Lightweight logging framework with native logging API for Kotlin.
• mplatvoet/kovenant - Promises for Kotlin and Android
• kotlin-telegram-bot/kotlin-telegram-bot - A wrapper for the Telegram Bot API written in Kotlin.
• Kotlin/kotlinx.atomicfu - The idiomatic way to use atomic operations in Kotlin.
• Kotlin/kotlinx-datetime - A multiplatform Kotlin library for working with date and time.
• MicroUtils/kotlin-logging - Lightweight logging framework for Kotlin. Used as a wrapper for slf4j with Kotlin extensions.
• ingokegel/jclasslib - jclasslib bytecode viewer is a tool that visualizes all aspects of compiled Java class files and the contained bytecode.
• puniverse/quasar - Fibers, Channels and Actors for the JVM.

• ParserKt/ParserKt - Naive one-pass recursive descent, scannerless parser framework for Kotlin
• asm0dey/staks - Extensible XML parser DSL, based on StAX
• sargunster/CakeParse - Simple parser combinator library for Kotlin.
• fork-handles/parser4k - Recursive descent parser combinator library
• h0tk3y/better-parse - A nice parser combinator library for Kotlin

• Pi4J/pi4j-kotlin - Pi4J Kotlin DSL and API.

• DetachHead/kotlinxpath - A typesafe builder for Xpath with several useful helper functions that make Xpath easier to work with
• ionspin/kotlin-multiplatform-libsodium - Kotlin multiplatform wrapper for Libsodium cryptographic library.
• petertrr/kotlin-multiplatform-diff - Multiplatform kotlin library for calculating text differences. Based on java-diff-utils.
• davidepianca98/KMQTT - MQTT Broker library/executables for Kotlin multiplatform.
• ctripcorp/mmkv-kotlin - The Kotlin Multiplatform wrapper for MMKV
• nacular/measured - Type-safe, intuitive units of measure
• ionspin/kotlin-multiplatform-bignum - Pure kotlin multiplatform arbitrary precision arithmetic library.
• GitLiveApp/firebase-kotlin-sdk - A Kotlin-first Multiplatform SDK for Firebase supporting iOS, Android & Web

• h0tk3y/regex-dsl - A Kotlin DSL for regular expressions

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

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

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

• Kotlin for Data Science - Kotlin for Data Science overview page
• thomasnield/kotlin-statistics - Advanced math and statistical extensions for Kotlin.
• unipu-ict/ksdtoolkit - Kotlin System Dynamics Toolkit - for system dynamics modelling and simulation with Kotlin.
• cdietze/euklid - A cross-platform geometry library in Kotlin
• lamba92/KGraph - A Kotlin multi-platform library for graph data structures
• grinisrit/noa-atra - Analytics for Trading with NOA
• sanity/pairAdjacentViolators - A Kotlin implementation of the Pair Adjacent Violators algorithm for isotonic regression.
• holgerbrandl/kalasim - Discrete event simulator that enables complex, dynamic process models.
• breandan/kaliningraph - 🕸️ Graphs, finite fields and discrete dynamical systems in Kotlin
• MarcinMoskala/KotlinDiscreteMathToolkit - Set of extensions for Kotlin that provides Discrete Math functionalities as an Kotlin extension functions.
• kyonifer/koma - A scientific computing library for Kotlin.
• JetBrains/lets-plot-kotlin - Grammar of graphics visualization for Kotlin
• breandan/kotlingrad - Shape-Safe Differentiable Programming with Algebraic Data Types.
• Kotlin/dataframe - A Kotlin library for in-memory data manipulation
• Kotlin/multik - A Kotlin library for working with multi-dimensional arrays
• mipt-npm/kmath - A (not so numpy-like) multiplatform mathematical library with higher level abstractions.
• Kotlin/kotlin-jupyter - Official Kotlin Jupyter kernel
• JetBrains/KotlinDL - High-level Deep Learning Framework written in Kotlin and inspired by Keras.
• kiegroup/optaplanner - Constraint solving AI for planning and scheduling problems.

• aPureBase/arkenv - Fully fledged command line arguments / environment variables parser via simple Kotlin delegates
• leprosus/kotlin-cli - Kotlin-CLI - command line interface options parser for Kotlin.
• jimschubert/kopper - A simple Kotlin option parser
• dbaelz/Konclik - Konclik: Kotlin/Native Command Line Interface Kit
• fork-handles/bunting4k - Simple, typesafe, testable command line flags
• kotlin-inquirer - A collection of common interactive command line user interfaces written in Kotlin
• varabyte/kotter - A declarative, Kotlin-idiomatic API for writing dynamic command line applications
• 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.
• ajalt/clikt - Clikt - Intuitive command line interface parsing for Kotlin.

• wendigo/chrome-reactive-kotlin - Headless Chrome DevTools Protocol Client (RxJava3 + Kotlin)

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

• MoviebaseApp/trakt-api - Modern powerful Trakt API to track, discover and share your movies & TV shows.
• JetBrains/space-kotlin-sdk - Kotlin client for JetBrains Space HTTP API
• MoviebaseApp/tmdb-api - Modern powerful TMDB API to fetch movies and TV shows for Kotlin Multiplatform.
• adamint/spotify-web-api-kotlin - Spotify Web API wrapper for Kotlin/Android, JVM, JS, and Native targets.
• awslabs/aws-sdk-kotlin - Multiplatform AWS SDK for Kotlin

• projectfluent/fluent-kotlin - Kotlin tooling implementation of ProjectFluent. Read, write, and transform Fluent files.
• cashapp/barber - A type safe Kotlin JVM library for building up localized, fillable, themed documents using Mustache templating.

• LighthouseGames/KmLogging - Kotlin multiplatform logging. High performance, composable and simple to use.

• CuriousNikhil/compose-particle-system - A lightweight particle system for Jetpack Compose - Quarks
• CuriousNikhil/k5-compose - K5-compose is a sketchy port of p5.js for Jetpack Compose Desktop
• Canopas/Intro-showcase-view - An android library to highlight different features of the app built using Jetpack Compose.
• CuriousNikhil/neumorphic-compose - Neumorphism UI on Android with Jetpack Compose. Just add one modifier = Modifier.neumorphic()

• derveloper/kiny - Your super simple private serverless service running your kotlin functions like AWS lambda.
• MichaelGrigoryan25/kotlin-url-shortener - Basic URL shortener built with Kotlin, Redis and Javalin
• cbedoy/DYUM - Basic Kotlin Implementation following MVP, and using Third Party library by Natural Analytics Language
• viniciusccarvalho/kodein-cloud-functions - Provides adapters to different cloud functions providers (AWS, Azure) to run vanilla kotlin functions defined as kodein modules
• 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.
• 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.
• IRus/kotlin-dev-proxy - Simple server for proxy requests and host static files written in Kotlin, Spark Java and Apache HttpClient.
• 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.
• ratpack/example-ratpack-gradle-kotlin-app - An example of a Kotlin Ratpack app built with Gradle.
• ssouris/petclinic-spring5-reactive - Spring 5 Reactive Petclinic app written in Kotlin.
• Ahoo-Wang/CoSky - High-performance, low-cost microservice governance platform. Service Discovery and Configuration Service
• eddywm/KTFLITE - Computer Vision on Android with Kotlin and Tensorflow Lite.
• mixitconf/mixit - MiXiT website
• sdeleuze/spring-boot-kotlin-demo - Basic Spring Boot app in Kotlin.
• corda/corda - Corda is a distributed ledger platform designed to record, manage and automate legal agreements between business partners.

• pubref/rules_kotlin - Bazel rules for Kotlin.
• cbeust/kobalt - Build system inspired by Gradle.

• neworld/gradle-jdeploy-plugin - Gradle plugin to publish JVM applications via npmjs.com
• krzema12/fsynth - Music synthesizer as a Kotlin multiplatform project
• madhead/tyzenhaus - Shared expenses tracking Telegram bot
• sureshg/InstallCerts - Create a PKCS12 TrustStore by retrieving server certificates.
• Poweranimal/PowerCollections - Powerfull Collections, Sets, Lists and Maps.
• vicboma1/GameBoyEmulatorEnvironment - Front-End developed with Kotlin Experimental for my GameBoy Emulator (coroutines).
• jenkinsci/doktor-plugin - Jenkins plugin for automated documentation uploading to Confluence.
• AngryJKirk/familybot - Telegram bot to have some fun with your buddies
• lice-lang/lice - A Lisp-like language's interpreter written in Kotlin
• mkobit/jenkins-pipeline-shared-libraries-gradle-plugin - Gradle plugin to help with build and test of Jenkins Pipeline Shared Libraries.
• ruslanys/telegraff - Kotlin DSL for Telegram Bots creation.
• borisf/classyshark-bytecode-viewer - View your Kotlin generated classes as Java and bytecode format.
• sourcerer-io/sourcerer-app - Visual profile for software engineers written in Kotlin.
• quicktype/quicktype - Generate Kotlin types and converters from JSON, Schema, TypeScript, and GraphQL

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

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

• 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.
• dkandalov/limited-wip - Plugin to limit your work-in-progress.
• dkandalov/pomodoro-tm - Pomodoro timer.
• izhangzhihao/intellij-rainbow-brackets - Rainbow Brackets / Rainbow Parentheses for IntelliJ IDEA based IDEs.
• roger-yh99/Readhub - Readhub is a News Reader plugin for IntelliJ IDEs
• roger-yh99/AwesomeKotlinPlugin - AwesomeKotlin plugin for IntelliJ IDEs
• emedinaa/kotlin-mvvm - MVVM(Model View ViewModel) sample in Kotlin using the components ViewModel, LiveData and Retrofit library
• emedinaa/kotlin-mvp-volley - Example of Android project in Kotlin using MVP(Model View Presenter) pattern and volley library
• emedinaa/android-recyclerview - Some samples about the RecyclerView and Adapters using kotlin
• emedinaa/kotlin-viewmodel - Basic samples about ViewModel component
• wuseal/JsonToKotlinClass - Plugin for IntelliJ IDEs to generate Kotlin data class code from JSON text
• csense-oss/idea-kotlin-checked-exceptions - Plugin to help integrate with java and exceptions (highlights, warns when not catching exceptions and a lot more)

• LouisCAD/kotlin-libraries-playground

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

• JakeWharton/kotterknife
• MarcinMoskala/ActivityStarter
• MarcinMoskala/KotlinPreferences
• MarcinMoskala/PreferenceHolder
• nsk-mironov/kotlin-jetpack
• pawegio/KAndroid
• chibatching/Kotpref
• TouK/bubble
• ragunathjawahar/kaffeine
• mcxiaoke/kotlin-koi
• PicsArt/stateful
• BennyWang/KBinding
• inaka/KillerTask
• 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.
• robinchew/mvil - 'Virtual DOM' for Android inspired by Anvil.
• 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
• hpost/rx-brainwaves - RxJava wrapper for NeuroSky MindWave headsets
• adrielcafe/KrumbsView - The ultimate breadcrumbs view for Android!
• inshiro/Skate - A simple and easy to use Android fragment stack controller
• cortinico/slidetoact - A simple 'Slide to Unlock' Material widget for Android, written in Kotlin
• AppIntro/AppIntro - Make a cool/material intro for you Android App - Now all in Kotlin!
• CuriousNikhil/gossip - Android TextToSpeech Helper to speak any text you want and handle events.
• adrielcafe/PufferDB - An Android & JVM key-value storage powered by Protobuf and Coroutines.
• adrielcafe/HAL - A non-deterministic finite-state machine for Android & JVM that won't let you down.
• coil-kt/coil - Image loading for Android backed by Kotlin Coroutines.
• levibostian/Shutter-Android - an Android library to take photos, record videos, pick images/videos from gallery, with ease. Written in Kotlin.
• skydoves/balloon - A lightweight popup like tooltips, fully customizable with arrow and animations.
• ChuckerTeam/chucker - An on-device network inspection tool for Android.
• rosariopfernandes/firecoil - Display images stored in Cloud Storage for Firebase using Coil.
• skydoves/Only - An easy way to persist and run code block only as many times as necessary on Android.
• skydoves/AndroidVeil - An easy, flexible way to implement veil skeletons and shimmering effect for Android.
• skydoves/Submarine - Fully customizable floating navigation view for listing items dynamically on Android.
• evilthreads669966/EvadeMe - A heuristics evasion library that prevents your code from being analyzed or tested.
• evilthreads669966/BootLaces - Turns your background service persistent.
• evilthreads669966/WakeService - An IntentService that keeps your processor awake while doing work.
• evilthreads669966/Pickpocket - An asynchronous Android library for content providers and more.
• evilthreads669966/EasyShells - A simple shell for executing Linux commands with responses
• mr-wizman/Consent - Easy Android permissions. Powered by Kotlin.
• matteocrippa/Parrot - A lightweight library to load remote image and handle caching in ImageView.
• deva666/peko - Android library for requesting runtime permissions with Kotlin Coroutines
• MackHartley/DashedView - The easiest way to create a dashed or striped background on Android
• MackHartley/RoundedProgressBar - A customizable, animated progress bar that features rounded corners. This Android library is designed to look great and be simple to use
• developingdeveloper-tech/toaster-android - A simple library to add custom toast to android applications.
• heart-switch - A heart-shaped toggle switch component for Jetpack Compose
• OTPComposable - A library dedicated to making OTP (One Time Password) components a breeze to implement
• skydoves/Needs - An easy way to implement modern permission instructions popup.

• nekocode/kotgo - An android development framework 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
• hpost/rx-mvi - Minimal framework for Model View Intent inspired Android applications written in Kotlin.
• LouisCAD/Splitties - A family of small Kotlin libraries for delightful Android development including View DSLs
• Miha-x64/Lychee - Data binding and persistence infrastructure for building Android and JavaFX UIs and binding them with data
• 0xe1f/ararat

• BanDev/Buddha-Quotes - A collaborative project to create a Free and Open Source Buddha Quotes app.
• 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.
• skydoves/DisneyMotions - A beautiful Disney app using transformation motions based on MVVM architecture.
• 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
• inshiro/Kodesh - Free and open source Bible for Android
• 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 - A library to help android developers work easily 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.
• adrielcafe/ChromaAndroidApp - Chromatic tuner app.
• cuongpm/youtube-dl-android - Video downloader for Android - Download videos from Youtube, Facebook, Twitter, Instagram, Dailymotion, Vimeo and more than 1000 other sites.
• dgngulcan/droid-feed - News feed aggregated exclusively for Android Developers.
• VMadalin/kotlin-sample-app - Android Sample App using modular, clean, scalable, testable Architecture written in Kotlin following the best practices with Jetpack
• PatilShreyas/Foodium - Foodium is a sample food blog Android application built to demonstrate use of Modern Android development tools - (Kotlin, Coroutines, Flow, Dagger 2, Architecture Components, MVVM, Room, Retrofit, Moshi, Material Components).
• skydoves/MarvelHeroes - A sample Marvel heroes application based on MVVM (ViewModel, Coroutines, LiveData, Room, Repository, Koin) architecture.
• halilozel1903/LearnKotlinProgramming - Let's Learn Kotlin Programming ❤️
• halilozel1903/KotlinTutorials - It's a project that contains lessons and examples about Kotlin programming language.
• android-password-store/Android-Password-Store - Android application compatible with ZX2C4's Pass command line application.
• PatilShreyas/NotyKT - NotyKT is a complete Kotlin-stack (Backend + Android) application built to demonstrate the use of Modern development tools with best practices implementation.
• Marwa-Eltayeb/CurrencyExchange - Currency Exchange App that displays real-time currency rates, shows a chart for any currency pair in the world to see their currency history and provides a currency converter.
• AmrDeveloper/Linkhub - Free and open source effective link management app with no ads.
• AnkitSuda/Rebound - Feature Rich & Highly Customizable Workout Log App.

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

• kiruto/debug-bottle - Debug Bottle is an Android runtime debug / develop tools written using kotlin language.
• didi/booster - Booster is an optimization toolkit for Android applications
• Kotlin/kdoctor - CLI tool that helps to set up the environment for Kotlin Multiplatform Mobile app development.

• agoda-com/Kakao - Nice and simple DSL for Espresso in Kotlin
• KakaoCup/Compose - Nice and simple DSL for Espresso Compose UI testing in Kotlin

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

• bufferapp/android-clean-architecture-mvi-boilerplate - A clean architecture boilerplate using android written in Kotlin and using the Model-View-Intent pattern
• bufferapp/clean-architecture-components-boilerplate - A clean architecture boilerplate using andorid architecture components for android written in Kotlin
• bufferapp/android-clean-architecture-boilerplate - A clean architecture boilerplate for android written in Kotlin

• 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-wrapper - 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.
• Foso/MpApt - Kotlin Native/JS/JVM Annotation Processor library
• fortytwoapps/kstitch - An object oriented toolkit for MongoDB Stitch in KotlinJS.

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

• perses-games/kudens - Develop browser games in Kotlin
• Ayfri/PIXI-Kotlin - Typings for the graphics library PixiJs

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

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

• 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.

• KwangIO/kwang
• msink/kotlin-libui