Joomla is a free, open source CMS, written in PHP that uses object-oriented programming, storing data in a MySQL database, and does page caching, RSS feeds, printable versions of pages, news flashes, blogs, polls, search - things that every CMS should do.

• Joomla now releases a new version of its platform every 6 months.
• Version 1.6, which was released in January, has been downloaded over 2.5 million times in the last 3.5 months.
• It works with a wide variety of SQL and noSQL databases.
• It's ready to use; it requires no hardware investments or spending on software.
• It has 23.5 million downloads as of June of 2011.
• It has over 500,000 registered users in its forums.
• Joomla is currently being used in over 200 countries.
• It has more than 2,500 International Government Agencies using the service to run those websites. (NASA, the US Air Force and US Army, included.)
• Joomla has never taken in outside investment.
• It has been collectively run by the nearly 250,000 developers that use http://joomlacode.org/ Joomlacode.org
• There are currently nearly 8,000 extensions available for the Joomla platform.