Kotlin GitHub Repositories (2026) · Open Source Tools

YouTube Music client for Android

An alternative frontend for YouTube, for Android.

AnkiDroid: Anki flashcards on Android. Your secret trick to achieve superhuman information retention.

Image loading for Android and Compose Multiplatform.

Kotlin SQL Framework

A modern I/O library for Android, Java, and Kotlin Multiplatform.

No-root Android + ESP32 Wi-Fi/BLE security testing toolkit. Deauth, captive portal, packet capture, BLE HID, and defense/detection modules, controlled over USB-OTG, no custom kernel or external adapter required.

A rewrite of Tachiyomi for the Desktop

✅ The programmer-friendly testing framework for Java and the JVM

SQLDelight - Generates typesafe Kotlin APIs from SQL

Free and open source manga reader for Android

Source code of extensions in https://github.com/keiyoushi/extensions

Koog is a JVM (Java and Kotlin) framework for building predictable, fault-tolerant and enterprise-ready AI agents across all platforms – from backend services to Android and iOS, JVM, and even in-browser environments. Koog is based on our AI products expertise and provides proven solutions for complex LLM and AI problems

All in one emulator on Android!

Third-party native Jellyfin Android app

:phone: The ownCloud Android App

Corda is an open source blockchain project, designed for business from the start. Only Corda allows you to build interoperable blockchain networks that transact in strict privacy. Corda's smart contract technology allows businesses to transact directly, with value.

The Pants Build System

Kotlin Multiplatform sample with SwiftUI, Jetpack Compose, Compose for Wear, Compose for Desktop, and Compose for Web clients along with Ktor backend.

📱The official Wikipedia app for Android!