Android was designed and built by Google in 2008. The operating system is written mainly in Java, with core components in C and C++. It is built on top of the Linux kernel, giving it incorporated security benefits.
🛠「Watt Toolkit」是一个开源跨平台的多功能 Steam 工具箱。
Open source real-time translation app for Android that runs locally
GameStream client for Android
FastHub the ultimate GitHub client for Android.
An Android Alerting Library
Reqable issue track repo
A simple music app using YouTube Music for backend
Mobile, desktop and website Apps with the same code
An unofficial https://bgm.tv ui first app client for Android and iOS, built with React Native. 一个无广告、以爱好为驱动、不以盈利为目的、专门做 ACG 的类似豆瓣的追番记录，bgm.tv 第三方客户端。为移动端重新设计，内置大量加强的网页端难以实现的功能，且提供了相当的自定义选项。 目前已适配 iOS / Android。
Text editor - Notes & ToDo (for Android) - Markdown, todo.txt, plaintext, math, ..
The FlutterShop template makes it easier to develop an e-commerce app using Flutter. It includes all the necessary pages to build a shopping app for both Android and iOS using flutter.
Generate a customized Privacy Policy and Terms of Use document for your mobile apps
📱 List of open source Flutter applications 
A Beautiful and Feature-rich Music & Video Player with Youtube Support, Built in Flutter
DNS over HTTPS / DNS over Tor / DNSCrypt client, WireGuard proxifier, firewall, and connection tracker for Android.
拷贝漫画的第三方APP，仅提供基础功能，更多丰富功能请移步官方版本
Android Library that lights items for tutorials or walk-throughs etc...
All in one emulator on Android!
Created by Google
Released September 23, 2008