Spring Boot helps you to create Spring-powered, production-grade applications and services with absolute minimum fuss.

RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM.

a fast, scalable, multi-language and extensible build system

Hystrix is a latency and fault tolerance library designed to isolate points of access to remote systems, services and 3rd party libraries, stop cascading failure and enable resilience in complex di…

Implementation of ImageView for Android that supports zooming, by various touch gestures.

Zipkin is a distributed tracing system

Arduino IDE 1.x

Zuul is a gateway service that provides dynamic routing, monitoring, resiliency, security, and more.

Tink is a multi-language, cross-platform, open source library that provides cryptographic APIs that are secure, easy to use correctly, and hard(er) to misuse.

A damn simple library for building production-ready RESTful web services.

Java DSL for easy testing of REST services

Use SQL to query Elasticsearch

Open source routing engine for OpenStreetMap. Use it as Java library or standalone web server.

Generate Java types from JSON or JSON Schema and annotate those types for data-binding with Jackson, Gson, etc

Spring Data Example Projects

An enhanced Guava-based event bus with emphasis on Android support.

MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap-memory. It is a fast and easy to use embedded Java database engine.

Support for adding OAuth1(a) and OAuth2 features (consumer and provider) for Spring web applications.

Ribbon is a Inter Process Communication (remote procedure calls) library with built in software load balancers. The primary usage model involves REST calls with various serialization scheme support.

A quickstart generator for Spring projects

Generates a unified GraphQL schema from gRPC microservices and other Protobuf sources

Add-ons for openHAB 1.x

Replicate your Key Value Store across your network, with consistency, persistance and performance.

Allows Android apps to interact with BLE beacons

The missing Java distribution of native C++ libraries

Plugin Framework for Java (PF4J)

Java unlimited redefinition of classes at runtime.

Java EE 7 Samples

Java MQTT lightweight broker

converts binary PDF to JSON and text, for server-side PDF processing and command-line use. Zero dependency.