Open source. Open possibilities.

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.

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.

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.

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.

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

ReVanced Manager is an Android app that downloads, patches, and customizes apps using ReVanced Patcher, continuing the legacy of Vanced.

VeloTrack is a free, MIT-licensed Android app for offline GPS cycling maps and ride recording, built with MapLibre and Protomaps — downloadable maps, GPX export, no accounts or analytics.

scrcpy is a cross-platform application that mirrors Android device screens to a computer via USB or TCP/IP, allowing control via keyboard and mouse without requiring root access.

A Flutter-based offline-first student productivity app for managing courses, attendance, grades, tasks, and Pomodoro focus sessions. Features a comic-print neo-brutalist design system with local Hive storage — no account or cloud required.

Berty is an open-source, privacy-first peer-to-peer messaging app built on the Wesh Protocol. It offers end-to-end encryption, works offline via BLE and mDNS, requires no phone number or email, and is designed for censorship-resilient communication.

LastChat is a feature-rich Android AI assistant forked from RikkaHub, offering multi-provider chat, RAG memory, multimodal input, built-in Python/JS engines, and local-first privacy.

Bitwarden's official Android client for its password manager and authenticator, built with Kotlin and Jetpack Compose, supporting phones and tablets on Android 10 and up.

AdAway is a free, open-source ad blocker for Android that uses hosts files and a local VPN to block ads system-wide. It offers stable and preview builds, supports custom host sources, and requires Android 8 or above.

A minimalistic Android note-taking app built as a learning playground for modern Android development practices including MVVM, Kotlin Coroutines, Room, and Material Design 3.

UScreen is an MIT-licensed Linux tool that turns an Android 8.1+ tablet into a real USB extended display and pressure-sensitive graphics tablet via ADB, with S Pen pressure, tilt, eraser and button support, built for KDE Plasma on Wayland.

Joplin is a free, open-source, privacy-focused note-taking and to-do application that supports Markdown and cross-platform synchronization.

LibrePods is a GPL-licensed project that reverse-engineers Apple's proprietary AirPods protocol to bring AirPods features to Linux and Android, including noise control modes, ear detection, battery status, head gestures and conversational awareness.

Seal is an open-source Android video and audio downloader built as a GUI for yt-dlp, supporting downloads from hundreds of video platforms with metadata embedding, subtitles, and playlist support.

Arranger is a work-in-progress, type-safe rich text editor engine and UI toolkit for Compose Multiplatform, with paragraph formatting, semantic runs, atomic mutations, undo/redo, and Markdown/HTML converters.

Tasks is an open-source productivity application based on the source code of the discontinued Astrid Android app.