Joomla – Open Source CMS
http://www.jawed.info/images/joomla_logo.png
Joomla is one of the best Content Management System (CMS) available. It is an open source software and available for free. Joomla is the software result of a serious disagreement between the Mambo Foundation founded in August 2005, and its development team. Joomla! is the continued development of the successful Mambo system.