Kotlin GitHub Repositories (2026) · Open Source Tools

Kotlin testing made easy, everywhere.

Server for executing kotlin code

Wireless CarPlay in your browser — a server-side receiver that turns any screen on your network into a head unit.

JNI Bind is a set of advanced syntactic sugar for writing efficient correct JNI Code in C++20 and up (or C++17 with clang).

Material Photo Widget is as simple as it can be: an Android home screen widget to display your favorite photos. It is a free, no-ads, open source alternative for people who want to customize their home screen.

Mobile app for Pixelfed and Vernissage

A paper library for creating custom inventory-based GUIs.

Ahead of Time Data Repositories

📸 A convenient Android gallery for your PhotoPrism library with plenty of useful features

MedTimer Android app

Advance wallpaper manager app for Android with cool glassmorphic UI, tags, auto wallpaper, custom effects and multiple folder support and a native live wallpaper picker.

Private and on-device speech recognition keyboard and service for Android.

Compose multiplatform library that enables the content to be zoomable by gestures

A plugin for generating BuildConstants for any kind of Gradle projects: Java, Kotlin, Groovy, etc. Designed for KTS scripts.

KMP/CMP GraphQL based conference project with Jetpack Compose Android, Compose for Wear, and Compose Multiplatform Desktop, Web and iOS clients along with GraphQL backend.

Add asynchronous RPC services to your multiplatform applications.

Secure and speedy templates for Java and Kotlin.

The Wikimedia Commons Android app allows users to upload pictures from their Android phone/tablet to Wikimedia Commons

Paperize is a modern fully offline dynamic wallpaper changer application built for Android using Kotlin, Jetpack Compose, and Material 3

SKIE - Swift Kotlin Interface Enhancer