Free and Open Source, Distributed, RESTful Search Engine

Spring Framework

An image loading and caching library for Android focused on smooth scrolling

ZXing ("Zebra Crossing") barcode scanning library for Java, Android

A browser automation framework and ecosystem.

Conductor is a microservices orchestration engine.

Tools to work with android .dex and java .class files

Apache ZooKeeper

Realm is a mobile database: a replacement for SQLite & ORMs

jsoup: the Java HTML parser, built for HTML editing, cleaning, scraping, and XSS safety.

Paging indicator widgets compatible with the ViewPager from the Android Support Library and ActionBarSherlock.

android java and javascript bridge, inspired by wechat webview jsbridge

Android filters based on OpenGL (idea from GPUImage for iOS)

Apache Cassandra®

Apache JMeter open-source load testing tool for analyzing and measuring the performance of a variety of services

Efficient reliable UDP unicast, UDP multicast, and IPC message transport

Examples and server integrations for generating the Swagger API Specification, which enables easy access to your REST API

React Native Local and Remote Notifications

Tutorials for using RabbitMQ in various ways

Apache Storm

A Java to iOS Objective-C translation tool and runtime.

Automated JSON API documentation for API's built with Spring

High-quality QR Code generator library in Java, TypeScript/JavaScript, Python, Rust, C++, C.

Full-featured Socket.IO Client Library for Java, which is compatible with Socket.IO v1.0 and later.

Source code to omnibus edition of _The Busy Coder's Guide to Android Development_

Demonstrates the features of the Spring MVC web framework

The WebRTC module for React Native

Optimized UI components for Firebase

DEPRECATED

Maps SDK for Android Utility Library