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

Event bus for Android and Java that simplifies communication between Activities, Fragments, Threads, Services, etc. Less code, better quality.

Open-source IoT Platform - Device management, data collection, processing and visualization.

A collection of source code generators for Java.

Catch common Java mistakes as compile-time errors

vʌvr (formerly called Javaslang) is a non-commercial, non-profit object-functional library that runs with Java 8+. It aims to reduce the lines of code and increase code quality.

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.

Reactive Streams Specification for the JVM

Backport of Java 8's lambda expressions to Java 7, 6 and 5

Annotation processor to create immutable objects and builders. Feels like Guava's immutable collections but for regular value objects. JSON, Jackson, Gson, JAX-RS integrations included

Allows Android apps to interact with BLE beacons

Java unlimited redefinition of classes at runtime.

Dynamic Code Evolution VM for Java 7/8

an open source solution to application performance monitoring for java server applications

Stream Processing and Complex Event Processing Engine

Easy to use, very low overhead, Java APM

Microserver is a Java 8 native, zero configuration, standards based, battle hardened library to run Java Rest Microservices via a standard Java main class. Supporting pure Microservice or Micro-mon…

Efficient execution and functional composition of database calls using jdbc and RxJava Observables

Java 8 annotation processor and framework for deriving algebraic data types constructors, pattern-matching, folds, optics and typeclasses.

BLESSED, a Bluetooth Low Energy (BLE) library for Android

inspectIT is the leading Open Source APM (Application Performance Management) tool for analyzing your Java (EE) applications.

jOOX - The Power of jQuery Applied to W3C DOM Like JDBC, DOM is a powerful, yet very verbose low-level API to manipulate XML. The HTML DOM an be manipulated with the popular jQuery product, in Java…

Apache Jackrabbit Oak

Apache Jackrabbit

Cgroup on JVM

A Java library for accessing the Cassandra database

Distributed Java Collections for ZooKeeper

A Maven Plugin that allows you to build, test, and publishing Docker images, so you know that the images you share are robust and reliable.

Maven plugin for Vagrant.

A Java library that uses ZooKeeper for distributed locking and synchronization