The world's fastest GTFS validator. Re-engineered in Rust for 50x performance. Runs on CLI, Python, Web (WASM), and Desktop.

Material Design 3 skill for Claude Code — 30+ components, design tokens, theming, responsive layout, and MD3 compliance audit

Jetpack Compose Agent Skill — AI-powered coding guidance with actual androidx/androidx source code receipts. Works with Claude Code, Codex CLI, Gemini CLI, Cursor, Copilot, Windsurf, and more.

Bluesky PDS (Personal Data Server) container image, compose file, and documentation

Compose Multiplatform sticker canvas app with drag, pinch-zoom, haptics, and tilt shimmer effects

Kotlin Multiplatform bindings for Bluesky

A list of Free Software network services and web applications which can be hosted on your own servers

Notes on migrating a Bluesky account

next generation framework for executing pybikes

Live video for the AT Protocol. Solving video for everybody forever.

A flexible and powerful mapping library for KMP • Built with pure common Kotlin code

Calf is a library that allows you to easily create adaptive UIs and access platform specific APIs with Compose Multiplatform (Adaptive UI, File Picker, WebView, Permissions...).

A highly customizable homepage (or startpage / application dashboard) with Docker and service API integrations.

A FOSS WireGuard & AmneziaWG Android client with auto-tunneling, lockdown & local proxying.

Docs is an open-source text editor: web-native, made for real-time collaboration, cleanly structured documents and sub-documents with full ownership of your data. Built to scale with Django and React.

A tool for recompiling Xbox 360 games to native executables.

Bananas🍌, Cross-Platform screen 🖥️ sharing 📡 made simple ⚡.

Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)

GitLab compatible JSON reporter for ktlint

Maintains a repository of all Ktor plugins

⚡️ A Compose-driven architecture for Kotlin and Android applications.

Cloud replacement for vacuum robots enabling local-only operation

DeepSpeech is an open source embedded (offline, on-device) speech-to-text engine which can run in real time on devices ranging from a Raspberry Pi 4 to high power GPU servers.

Play lunar lander in you windows file copy dialog

Website source code for w3id.org.

Multiple samples showing the best practices in animation on Android.

Slack messages for GitHub Action workflows, jobs and steps

Sample projects for Ktor

Design Patterns implemented in Kotlin