Open source. Open possibilities.

An advanced, system-level personal security and anti-coercion suite for Android. Running as a systemless priv-app with LSPosed hooks, it provides duress PINs, hardware tripwires, and remote SMS control.

A collection of Android quickstart samples demonstrating various Firebase APIs, with instructions to integrate each sample into a Firebase project.

ZManager CLI (zm) is a universal, cross-platform file archiver focused on safe extraction of diverse formats and deliberate creation of modern archives like ZIP, 7z, and TZAP, with strong security defaults.

Simple Multi Apps - Kotlin is an open-source Android application featuring a modular collection of tools including a stopwatch, games, PDF reader, and video player.

PlainApp is a free, open-source Android application that transforms your phone into a self-hosted management hub accessible via a web browser on the same local network.

Kivy is an open-source Python framework for developing cross-platform GUI applications for desktop, mobile, and embedded platforms.

tldr-pages is a community-maintained collection of simplified, practical help pages and cheatsheets for thousands of command-line tools, offering an approachable alternative to traditional man pages.

MakaMek is an open-source, cross-platform implementation of the classic BattleTech tabletop tactics game. Built with .NET 10 and AvaloniaUI, it offers a simplified, mobile-first experience with support for local, LAN, and internet multiplayer.

A highly customizable calendar library for Android and Compose Multiplatform, providing the logic for date displays while allowing developers to define the UI.

VGS Show Android SDK lets apps securely display sensitive data from a vault using customizable views and reveal flows, without routing raw data through client systems.

RustDesk is an open-source remote desktop application written in Rust. It works out of the box, supports self-hosted rendezvous/relay servers, and offers file transfer, TCP tunneling, and cross-platform clients.

GSYVideoPlayer is a multi-functional Android video player supporting IJKPlayer, Media3 (ExoPlayer), MediaPlayer, and AliPlayer kernels with extensive playback, caching, and customization features.

An Android client for V2Ray that supports both Xray and v2fly cores, providing proxy capabilities on mobile devices.

Threadbase Mobile is a local-first mobile control plane for monitoring and managing AI coding agent sessions, such as Claude Code and Codex, via a connected tb-streamer instance.

Google's official Android architecture samples: the same TODO app implemented across branches to demonstrate Jetpack Compose, ViewModel, Flow/coroutines, Room, Hilt and layered testing patterns.

This project is a personal blog and reading notes repository built based on GitHub Issues and GitHub Actions. It mainly records the author's excerpts, reading reflections, workplace thoughts, emotional essays, as well as content related to mobile development (Flutter, Swift) and technical accumulation.

A curated list of Android security resources including tools for static/dynamic analysis, reverse engineering, fuzzing, and vulnerability scanning.

Sensitivity is a cross-platform Xiaomi Mi Recovery flash and rescue tool with a native WinUI 3 Windows app and a Rust CLI. It validates official Recovery ROMs, flashes them over USB, and provides diagnostics—without requiring adb, an unlocked bootloader, or proprietary Xiaomi software.

Mindustry is an open-source tower-defense real-time strategy game with heavy automation and factory-building elements, written in Java. It targets desktop, Android and dedicated server builds, and ships with modding support, a public wiki, Javadoc and an active suggestion tracker.

Free index of Chinese programming books covering operating systems, AI, Web, algorithms, and various programming languages, with community contributions.