Kotlin GitHub Repositories (2026) · Open Source Tools

Android application written in Kotlin with the sole purpose of completely automating a run of Uma Musume Pretty Derby.

Kotlin Multiplatform library that generates JSON Schemas from your methods and classes both at compile-time via Kotlin Symbol Processing(KSP) and at runtime via reflection or kotlinx.serialization.

🌻 The Open Source app Petals aims to help its users to either quit weed, reduce usage or simply know how much they're using.

Native Android client for Music Assistant, focused on music exploration and discovery: Follow Me room detection with BLE fingerprints, a local recommendation engine (Smart Mix, Genre Radio) with MusicBrainz genres, similar artists, Sendspin phone-as-speaker, Android Auto and Android TV.

Ensure your password safety by scanning in data breaches.

Starlasu - A Language Engineering Framework

A Kotlin Multi-Platform ecosystem for symbolic AI

Application configuration / properties loading for JVM applications

🔙 Tapmoc helps with your backward compat

Local-first, open-source Android automation with readable rules, honest permission gates, and no account or cloud runtime.

Native Android media downloader for VRKA with direct extraction and browser-assisted stream discovery.

A Jellyfin + Emby Client App with modern UI

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.

Cross-platform desktop tool for analyzing Gradle and Kotlin Multiplatform projects, cleaning build folders, managing SDK resources, and optimizing development environments.

YouTube Music client for Android

An anti-bikeshedding Kotlin linter with built-in formatter

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

An open-source keyboard for Android which respects your privacy. Currently in beta.

Folio Launcher: a clean, iPhone-style (iOS) Home Screen for Android foldables like the Galaxy Z Fold, with jailbreak-inspired tweaks. Free, open source, no root.

Your Google services (RCS, Google Wallet, Play Integrity attestations) read on-device. No internet, root required.