Kotlin Kotlin

Open-source Kotlin projects categorized as Kotlin | Edit details

Top 23 Kotlin Kotlin Projects

  • GitHub repo OkHttp

    Square’s meticulous HTTP client for the JVM, Android, and GraalVM.

    Project mention: HttpClient can't connect to a TLS proxy | dev.to | 2021-09-13

    https://github.com/square/okhttp/issues/3787 Discovered another client that doesn't support it either

  • GitHub repo kotlin

    The Kotlin Programming Language.

    Project mention: Last preview of Kotlin 1.6.0 is out (/r/Kotlin) | reddit.com/r/mistyfront | 2021-10-15
  • Scout APM

    Scout APM: A developer's best friend. Try free for 14-days. Scout APM uses tracing logic that ties bottlenecks to source code so you know the exact line of code causing performance issues and can get back to building a great product faster.

  • GitHub repo leakcanary

    A memory leak detection library for Android.

    Project mention: 25 Best Android Libraries, Projects, and Tools You Won’t Want to Miss Out in 2021 | dev.to | 2021-10-09

    Knowing when root views are detached, e.g. to detect if they might be leaking (LeakCanary).

  • GitHub repo material-dialogs

    😍 A beautiful, fluid, and extensible dialogs API for Kotlin & Android.

    Project mention: Weekly Questions Thread February 16 2021 | reddit.com/r/androiddev | 2021-02-19

    I use Material Dialog https://github.com/afollestad/material-dialogs which allows you to pass in HTML for the message which uses the color as I defined here.

  • GitHub repo tachiyomi

    Free and open source manga reader for Android.

    Project mention: Why do you use android over iOS? | reddit.com/r/AndroidMasterRace | 2021-10-13

    Less of an App Store monopoly You can download and install apps like you can on a Windows PC, you are not limited to just the Play Store. Tachiyomi is an app that can be downloaded outside an app store.

  • GitHub repo recyclerview-animators

    An Android Animation library which easily add itemanimator to RecyclerView items.

    Project mention: How can I code an app like this? | reddit.com/r/androidapps | 2021-02-23

    Probably uses a library of some sort for animations, the rest would be Recyclerviews and components normal to Android. The whole thing is set in a Fragment/ Tabbed Activity.

  • GitHub repo kotlinx.coroutines

    Library support for Kotlin coroutines

    Project mention: Updating my tech stack: RxJava vs Flow | reddit.com/r/androiddev | 2021-10-01

    The catch operator ignores CancellationException which is used for cooperative cancellation in coroutines and flows. If you use try/catch, make sure you're not accidentally swallowing those exceptions. The same goes for runCatching, which catches all Throwables.

  • Nanos

    Run Linux Software Faster and Safer than Linux with Unikernels.

  • GitHub repo awesome-kotlin

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

    Project mention: How to find templates and packages for Kotlin or Android? | reddit.com/r/Kotlin | 2021-05-12

    and repos like https://github.com/KotlinBy/awesome-kotlin containing quite a lot of useful stuff

  • GitHub repo ktor

    Framework for quickly creating connected applications in Kotlin with minimal effort

    Project mention: Experiences with Kotlin for web? | reddit.com/r/Kotlin | 2021-09-09

    Not sure if it’s on topic but I played a bit with ktor a couple of years ago. It was a nice experience.

  • GitHub repo Coil

    Image loading for Android backed by Kotlin Coroutines.

    Project mention: Requesting best practices to remove lag on Jetpack compose Sectioned LazyColumn | reddit.com/r/androiddev | 2021-09-30

    u/khaled2252 Thank you for the reply. I do use images and for loading images, I am relying on coil-compose library. I also had the similar thought like yours and only used simple

  • GitHub repo koin

    Koin - a pragmatic lightweight dependency injection framework for Kotlin

    Project mention: Can someone suggest a simple dependency injection library for TypeScript/JavaScript? | reddit.com/r/typescript | 2021-10-13

    I've been using Angular a lot and I like how it works. I'm also a huge fan of koin for kotlin.

  • GitHub repo RxKotlin

    RxJava bindings for Kotlin

  • GitHub repo compose-jb

    Jetpack Compose for Desktop and Web, a modern UI framework for Kotlin that makes building performant and beautiful user interfaces easy and enjoyable.

    Project mention: Updating my tech stack: RxJava vs Flow | reddit.com/r/androiddev | 2021-10-01

    I will say on the topic of multiplatform, rxjava isn't directly supported. However there is a multiplatform Rx library called reaktive which has way better testing support compared to coroutines at the moment. although if multiplatform is something you're interested in doing I would start the project off rather than do it later to save time in the long run. If you're interested, the mpp Todo sample is a good example demonstrating a lot of everything.

  • GitHub repo Compressor

    An android image compression library.

  • GitHub repo ideavim

    Vim emulation plugin for IDEs based on the IntelliJ Platform

    Project mention: How in the hell do you increment a sequence of numbers with find/replace (regular expressions) in InjtelliJ/AppCode? | reddit.com/r/IntelliJIDEA | 2021-05-09

    It's very easy to do in Intellij with ideavim

  • GitHub repo Exposed

    Kotlin SQL Framework

    Project mention: Ask HN: Is Ktor a good back end framework to learn? | news.ycombinator.com | 2021-10-09

    A bit late but I use this which is a wrapper over JDBC: https://github.com/JetBrains/Exposed

  • GitHub repo android-showcase

    💎 Android application following best practices: Kotlin, Coroutines, JetPack, Clean Architecture, Feature Modules, Tests, MVVM, DI, Static Analysis...

    Project mention: Been out of Android dev for a few years. What's the most important things for me to read up on? | reddit.com/r/androiddev | 2021-06-26

    Some repos here: https://github.com/igorwojda/android-showcase

  • GitHub repo javalin

    A simple and modern Java and Kotlin web framework

    Project mention: Java Equivalent of Express.js for REST | reddit.com/r/java | 2021-10-14


  • GitHub repo Pokedex

    🗡️ Android Pokedex using Hilt, Motion, Coroutines, Flow, Jetpack (Room, ViewModel) based on MVVM architecture.

    Project mention: Open source apps that use Android architecture components? | reddit.com/r/androiddev | 2021-06-24
  • GitHub repo Kategory

    Λrrow - Functional companion to Kotlin's Standard Library (by arrow-kt)

    Project mention: Is there any KEEP for adding support to something like F# computation expressions to Kotlin? | reddit.com/r/Kotlin | 2021-10-15

    There is also https://arrow-kt.io/

  • GitHub repo tivi

    Tivi is a work-in-progress TV show tracking Android app, which connects to Trakt.tv. It is still in its early stages of development and currently only contains two pieces of UI. It is under heavy development.

    Project mention: Open Source Android projects with good testing coverage | reddit.com/r/androiddev | 2021-08-15
  • GitHub repo ktlint

    An anti-bikeshedding Kotlin linter with built-in formatter

  • GitHub repo uhabits

    Loop Habit Tracker, a mobile app for creating and maintaining long-term positive habits

    Project mention: Selfhosted mobile friendly task logger | reddit.com/r/selfhosted | 2021-08-18

    If you use Android then I recommend https://github.com/iSoron/uhabits. There is no server but it has built-in stats and can export raw data if needed.

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020). The latest post mention was on 2021-10-15.


What are some of the best open-source Kotlin projects in Kotlin? This list will help you:

Project Stars
1 OkHttp 40,943
2 kotlin 38,959
3 leakcanary 26,798
4 material-dialogs 19,037
5 tachiyomi 13,109
6 recyclerview-animators 10,860
7 kotlinx.coroutines 9,912
8 awesome-kotlin 9,591
9 ktor 8,885
10 Coil 7,136
11 koin 6,999
12 RxKotlin 6,736
13 compose-jb 6,359
14 Compressor 6,156
15 ideavim 6,000
16 Exposed 5,539
17 android-showcase 5,123
18 javalin 5,068
19 Pokedex 4,704
20 Kategory 4,592
21 tivi 4,509
22 ktlint 4,492
23 uhabits 4,388
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