Joomla
Joomla! is a powerful open source content management system. It is used for managing simple Web sites and complex corporate applications. Joomla! is easy to install, simple to manage, and reliable. Once Joomla! is installed and running, it is simple for even non-technical users to add or edit content, update images, and to manage critical data. Anybody with basic word processing skills can easily learn to manage a Joomla! site.