Joomla! is a full-featured content management system that can be used for everything from simple web sites to complex corporate applications. Continue reading for a detailed feature list. 

• A large and healthy international user and developer community.
• Provides a basic level of content approval for registered users.
• Online help.
• Page caching mechanism to improve performance on busy sites.
• Trash manager
• Advertising management (banners, etc).
• Media (images, documents) upload and management.
• Content display scheduling.
• Content syndication through other websites/portals (RSS feeds).
• Search engine friendly (SEF) URL's.
• Internationalisation (interface translation).
• Content macro language (aka Mambots).
• Advanced and separate system administration system.
• Advanced package/add-on/template deployment system.
• Hierarchical user access groups.
• Basic visitor statistics.
• Multiple WYSIWYG content editor support
• Simple polls
• Content voting/rating system

Many more free add-ons are available at mamboforge.net. Some of these add-ons include:

• LDAP (database) authentication
• Extended user profiles and user management.
• Forums
• Media galleries
• Document managers
• Templates
• Events calendars
• and many, many more...

For more information on the Joomla! content management system, please visit www.joomla.org or www.opensourcematters.org.