Stars
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.
Micro second messaging that stores everything to disk
JUnit runner that executes tests in a remote JVM
A Mavenized fork of http://high-scale-lib.sourceforge.net/
Hosting git repositories -- Gitolite allows you to setup git hosting on a central server, with very fine-grained access control and many (many!) more powerful features.
Lib that help create simple socket client, server on php
Arduino-library to communicate with URM37 ultrasound sensor
Tutorials for using RabbitMQ in various ways