Java Kotlin

Open-source Java projects categorized as Kotlin

Top 23 Java Kotlin Projects

  • Permission Dispatcher

    A declarative API to handle Android runtime permissions.

    Project mention: New app: xml or compose? | /r/androiddev | 2023-02-24

    I liked for example, but annotation processors are hard to maintain. Look at libraries like Mortar-Architect or Blade or even better Permissions-Dispatcher which actually breaks builds after certain Kotlin versions.

  • glide-transformations

    An Android transformation library providing a variety of image transformations for Glide.

  • Onboard AI

    Learn any GitHub repo in 59 seconds. Onboard AI learns any GitHub repo in minutes and lets you chat with it to locate functionality, understand different parts, and generate new code. Use it for free at

  • android-classyshark

    Android and Java bytecode viewer

  • REST Assured

    Java DSL for easy testing of REST services

  • GmsCore

    Free implementation of Play Services

    Project mention: Plans to update to 0.3 in microg's lineage builds? | /r/MicroG | 2023-12-09

    In release notes for GmsCore v0.2.29.233013 (, I also see:

  • from-java-to-kotlin

    From Java To Kotlin - Your Cheat Sheet For Java To Kotlin

  • junit5

    ✅ The 5th major version of the programmer-friendly testing framework for Java and the JVM

    Project mention: Refactoring Multi-Module Kotlin Project With Konsist | | 2023-09-04

    To make the above check work we need to wrap it in JUnit test:

  • InfluxDB

    Collect and Analyze Billions of Data Points in Real Time. Manage all types of time series data in a single, purpose-built database. Run at any scale in any environment in the cloud, on-premises, or at the edge.

  • Micronaut

    Micronaut Application Framework

    Project mention: Java 21 Released | | 2023-09-19
  • Blurry

    Blurry is an easy blur library for Android

    Project mention: Ideas on how to implement this view? (XML) | /r/androiddev | 2023-07-01

    For blurs, I’ve had some limited success with in the past.

  • dialogplus

    Advanced dialog solution for android

  • AmazeFileManager

    Material design file manager for Android

    Project mention: Is there any permanent way to stop System Updates after v51/v53/v54 ? | /r/QuestPiracy | 2023-07-03

    here's the page to download the apk:

  • Android Tips & Tricks

    :ballot_box_with_check: [Cheatsheet] Tips and tricks for Android Development


    LWJGL is a Java library that enables cross-platform access to popular native APIs useful in the development of graphics (OpenGL, Vulkan, bgfx), audio (OpenAL, Opus), parallel computing (OpenCL, CUDA) and XR (OpenVR, LibOVR, OpenXR) applications.

    Project mention: My Game won't start :( | /r/BetterThanWolves | 2023-11-23

    (The LWJGL binding of OpenAL. For more information, see

  • ObjectBox Java (Kotlin, Android)

    Java and Android Database - fast and lightweight without any ORM

    Project mention: Publishing to F-Droid | | 2023-10-02

    When I first attempted to publish to F-Droid, I experienced several pipeline issues. After reading through the pipeline logs in GitLab, I realized that my application's database (ObjectBox) was not entirely FOSS compliant and was causing build failures. The following day was spent migrating my app to Room.

  • JaCoCo

    :microscope: Java Code Coverage Library

    Project mention: Apache Maven JaCoCo Configuration | | 2023-10-27

    I will use here JaCoCo, where also the JaCoCo-Maven-lugin exists for the usage in your Maven builds. This article will show how to configure the code coverage to finally get the results for unit- and integration-tests.

  • spotless

    Keep your code spotless

    Project mention: FLiPN-FLaNK Stack for March 6, 2023 | | 2023-03-06
  • android

    📱 Nextcloud Android app

    Project mention: ⟳ 4 apps added, 39 updated at | /r/FDroidUpdates | 2023-12-05

    Nextcloud Dev (version 20231202): Synchronization client

  • vertx-examples

    Vert.x examples

    Project mention: What's the state of server-side frameworks with Kotlin support today for small teams? | /r/Kotlin | 2023-04-17

    Personally, I like vertx, it is modular and you can pick and choose what you need. It also has support for kotlin coroutines,,

  • AutoDispose

    Automatic binding+disposal of RxJava streams.

  • LeafPic

    LeafPic is a fluid, material-designed alternative gallery, it also is ad-free and open source under GPLv3 license. It doesn't miss any of the main features of a stock gallery, and we also have plans to add more useful features. (by UnevenSoftware)

  • requery

    requery - modern SQL based query & persistence for Java / Kotlin / Android

    Project mention: Learning Android’s Room Database Made Easy | /r/androiddev | 2023-01-22

    ah, I was thinking of but I wasn't really sure, also that project is dead oh no :D

  • springdoc-openapi

    Library for OpenAPI 3 with spring-boot

    Project mention: Setting up swagger | /r/SpringBoot | 2023-06-25

    I would suggest using Springdoc

  • Aliucord

    A modification for the Discord Android App

    Project mention: As Apps que consideram indispensáveis | /r/CasualPT | 2023-06-23


  • SaaSHub

    SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

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 2023-12-09.

Java Kotlin related posts


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

Project Stars
1 Permission Dispatcher 11,171
2 glide-transformations 9,832
3 android-classyshark 7,405
4 REST Assured 6,593
5 GmsCore 6,243
6 from-java-to-kotlin 6,002
7 junit5 5,991
8 Micronaut 5,867
9 Blurry 5,485
10 dialogplus 5,004
11 AmazeFileManager 4,812
12 Android Tips & Tricks 4,689
13 LWJGL 4,439
14 ObjectBox Java (Kotlin, Android) 4,261
15 JaCoCo 3,878
16 spotless 3,863
17 android 3,687
18 vertx-examples 3,474
19 AutoDispose 3,335
20 LeafPic 3,249
21 requery 3,130
22 springdoc-openapi 2,920
23 Aliucord 2,847
SaaSHub - Software Alternatives and Reviews
SaaSHub helps you find the best software and product alternatives