Kotlin GitHub Repositories (2026) · Open Source Tools

Track your caffeine. Protect your sleep. A privacy-first Material 3 Expressive Android app that shows your active caffeine level in real time and tells you if that late espresso will cost you tonight.

Add interactive vector tile maps to your Compose app

Thor - Android App Manager and App Installer utility

Focus: a text-only, black and white minimalist launcher for Android. App timers that lock distracting apps, a weekly screen time review, no internet permission.

Free and open source anime watcher for Android

Native Android & iOS client for LibreChat, built with Kotlin Multiplatform and Compose Multiplatform

Framework for quickly creating connected applications in Kotlin with minimal effort

Premium audiophile grade offline music player with native DSP, Visualizer, 10-Band Equalizer, Parametric Equalizer with PreAmp and Milkdrop support, currently in initial alpha testing.

Bring the native Dynamic Island experience to HyperOS. Bridges android notifications into HyperIslands.

A Material Design 3 Expressive Digital Wellbeing App

Add home screen quick actions / shortcuts and custom icons to your Expo app

Stock Android Launcher From Scratch

Native Telegram client for Android

A smallish Android RSS reader

Measure helps mobile teams monitor and fix crashes, ANRs, bugs, and performance issues. The open source alternative to Firebase Crashlytics.

Nostr client for Android

A meticulous HTTP client for the JVM, Android, and GraalVM.

A memory leak detection library for Android.

Tool for visualizing GitHub profiles

🩵 A free, open-source app store for developers' releases on GitHub, Codeberg & Forgejo — browse, discover, and install apps with one click. Formerly GitHub Store.