Slack Developer Kit (including Bolt for Java) for any JVM languages
Free implementation of Play Services
A tool for reverse engineering Android apk files
Desktop/Android/HTML5/iOS Java game development framework
LSPosed Framework
Android reverse engineering & automation framework
Open QR Code is an open-source, cross-platform app
PJSIP project
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
An efficient, small mobile key-value storage framework
PhotoEditor SDK: A fully customizable photo editor for your app
Library for parsing and validating international phone numbers
A bytecode optimizer for Android apps
Java binary serialization and cloning, fast, efficient, automatic
Fast dependency injector for Android and Java
The modular web framework for Java and Kotlin
Android unit testing framework
Picture Selector Library for Android
Uber's cross-platform mobile architecture framework
Refresh layout framework
A declarative framework for building efficient UIs on Android
A flexible, stable, easy-to-use Android plug-in framework
High-level Deep Learning Framework written in Kotlin
Java Application Framework
Cerberus Content Management System