Slack Developer Kit (including Bolt for Java) for any JVM languages
Free implementation of Play Services
Cross-platform framework for building truly native mobile apps
Build cross-platform native progressive web apps for iOS and Android
A Java wrapper to run Spring, Spring Boot, Jersey, and other apps
The Leading Security Assessment Framework for Android
A tool for reverse engineering Android apk files
A Java to iOS Objective-C translation tool and runtime
Uber's cross-platform mobile architecture framework
Comprehensive programming and configuration model for modern apps
A complete solution for apps using root permissions
Type-safe HTTP client for Android and Java by Square
Used to integrate Android apps with Facebook Platform
A flexible, stable, easy-to-use Android plug-in framework
Modular and customizable Material Design UI components for Android
Samples demonstrating how to use Maps SDK for Android
The binary distribution of openHAB
Gradle/Maven plugin to package Java applications as native Windows
OkBuck is a gradle plugin that lets developers build systems
An Android library for managing images and the memory they use
Android Permissions Framework, Adapt to Android 16
Image cropping library for Android
Vaadin 6, 7, 8 is a Java framework for modern Java web applications
WordPress for Android