http://typo3.org
With more than 500,000 installations the TYPO3 CMS is the most widely used Enterprise Content Management System, providing the basis for websites, intranets and web & mobile applications worldwide. Starting with small websites for businesses and non-profit organizations, all the way through to large multi-lingual portals for global enterprises, TYPO3 provides the basis for modern content management - always with a focus on the current needs of businesses and public institutions. With its license-cost-free open source approach, TYPO3 is also particularly interesting for small and medium enterprises and municipalities, where startup and ongoing costs for licenced systems can be prohibitive.