Cerberus Content Management System
Leveraging the shoulder of a Giant, x205 is complete ready to use CMS.
Open-Source Digital Experience Management Platform for Enterprises
Phantom-X CMS is an easy to use full sized Content Management System.
SEEyp is a free collection of code snippets: PHP, Java, C++.
Joomad! Joomla for Android
Multilingual FAQ and other addons for the Geeklog CMS
SpanTrax is a fork based on PostNuke.