A content management system (CMS) can be used to easily create and manage documents on a website, intranet or extranet. Content management systems are often open source and therefore free. Free content management systems often require a license for support and updates and require proper credit for the system authors and developers.
Joomla, Drupal, Mambo, and MovableType are popular content management systems that are also free. These CMS' can also function as document management software allowing you to store, organize and distribute enterprise documents such as contracts, brochures, newsletters, and other related documents critical to your business operations.