TYPO3 is a free Open Source content management system for enterprise purposes
on the web and in intranets. It offers full flexibility and extendability while
featuring an accomplished set of ready-made interfaces, functions and modules.

Obsolete stable release
This release will get full support (bug fixes and security fixes) until December
2012, but will getsecurity fixes until April 2013. This means that support for
this version will be dropped entirely when TYPO3 6.1 is released. Updating to
TYPO3 6.0 is recommended.

WWW: http://typo3.org/