Kotlin GitHub Repositories (2026) · Open Source Tools

:blue_book: A diary application optimized for user experience.

A graceful multiplatform bluesky client

⚡ Kotlin Coroutines binding APIs for Android UI widgets from the platform and support libraries

CodeCharta is a visualization tool that transforms complex software architecture and code metrics into interactive, customizable visual maps, empowering everyone to communicate and analyze your codebase. Improve code quality, maintainability, and architectural decisions

Open-source music player for Android and Windows with no accounts or tracking. Built for quick discovery, synced lyrics, radio, and rich artwork ♫

PennyWise automatically reads transaction SMS messages and transforms them into organized financial data with on-device AI assistance. No manual entry, no cloud processing, complete privacy.

Gesture-first Android browser with Material 3 Expressive design and local privacy tools

Lint checks to aid with a healthy adoption of Compose

Port of a popular ruby faker gem written in kotlin. Generate realistically looking fake data such as names, addresses, banking details, and many more, that can be used for testing and data anonymization purposes.

Unofficial Android App for DeepL Translator

DAO oriented database mapping framework for Java

📱 Android private messenger, crypto wallet and light node to Mixin Network

Supporting code for the tutorials on https://www.baeldung.com/kotlin

Kuvasz (pronounce as [ˈkuvɒs]) is an open-source uptime and SSL monitoring service, with multiple notification channels, status pages, IAC support via YAML, Prometheus integration, a complete REST API and many more!

It's Android's first OpenOffice Document Reader!

A simple configuration library for Java applications providing a node structure, a variety of formats, and tools for transformation

Cross-platform on-device AI toolkit

🧭 Kotlin Multiplatform library location toolkit for geocoding and geolocation

Yet another independent fork of kabouzeid/Phonograph -- a revived classic material designed music player for Android

A free online & offline learning platform to make quality education accessible for all.