You can find a list of community projects here.
Java
Flaky
Flaky is a plugin for nose that automatically reruns flaky tests. Instead of skipping flaky unit tests for components that aren't 100% reliable, use flaky to automatically retry them.
Bart
The Bart PHP project is a collection of many of the critical pieces of our PHP framework.
Shmock
Shmock is a smooth alternative for creating mocks with PHPUnit that uses the mock/replay concept from EasyMock but uses closures to define the scope for mocking.
Spout
Spout is a PHP library to read and write CSV and XLSX files, in a fast and scalable way. Contrary to other file readers or writers, it is capable of processing very large files while keeping the memory usage really low (less than 10MB).
Stalker
A jQuery plugin allowing elements to follow the user as they scroll a page.
Anemometer
This is the Box Anemometer, the MySQL Slow Query Monitor. This tool is used to analyze slow query logs collected from MySQL instances to identify problematic queries.
Rain Gauge
Rain Gauge is a tool to simplify the process of collecting detailed information from mysql database servers when specific conditions are triggered.
ClusterRunner
ClusterRunner makes it easy to execute test-suites across your infrastructure in the fastest and most efficient way possible.