Stars
Realm is a mobile database: a replacement for SQLite & ORMs
libbpg (copy of the source code for easy access)
Virtual Engine for Android(Support 14.0 in business version)
A lite library, you can make your project depend it easily, and your project will be UNDEAD (contains api from 9 to 23, lol).
PAC/Dnsmasq/Wingy file Generator, working with gfwlist, support custom rules.
Gmail style MultiAutoCompleteTextView for Android
A plugin framework on android,Run any third-party apk without installation, modification or repackage
Android-Iconics - Use any icon font, or vector (.svg) as drawable in your application.
Rhino is an open-source implementation of JavaScript written entirely in Java
An Android library supports badge notification like iOS in Samsung, LG, Sony and HTC launchers.
Stetho is a debug bridge for Android applications, enabling the powerful Chrome Developer Tools and much more.
A camera app using the new camera2 API in Android Lollipop
Views and Drawable for displaying animated GIFs on Android
[UNMAINTAINED] Emoji (Unicode) and emoticon support for Java and Android
An image loading and caching library for Android focused on smooth scrolling
Proof of concept Android WebView implementation based on Chromium code
A curated list of awesome awesomeness
中文版 Apple 官方 Swift 教程《The Swift Programming Language》
Powerful and flexible library for loading, caching and displaying images on Android.
A iOS like slide back Activity framework.
Sugared List Animations Sample
You can create animation in UIKit just like cocos2d's CCAction (also API in Sprite Kit without iOS7). It's really easy if you'll play a animation sequence.
[已废弃]中文图标字体，可用于 Web 或 iOS，同时提供了国内各种常用网站、应用的徽标 SVG 源文件。
Square’s meticulous HTTP client for the JVM, Android, and GraalVM.
An OSX style genie effect inside your iOS app.
Runtime Code Injection for Objective-C & Swift