Joomla 1.5 is an improved version of the Joomla Content Management System, which is one of the leading Open-source CMSes. While still in its Beta 1 version, Joomla! 1.5 is still as easy to use as its earlier stable version, but with substantial improvements. Joomla! 1.5 implements the core requirements of a full-featured CMS. It has a powerful and extensible templating system with the ability to upload and manage many different data types. User access control, content approval, rich administrative control, and content display scheduling are all built-in.