Joomla! According to the website, Joomla! "is one of the most powerful Open Source Content Management Systems on the planet. It is used all over the world for everything from simple websites to complex corporate applications. Joomla! is easy to install, simple to manage, and reliable.
"The basic Joomla! package is designed to be easy to install, even for non-programmers. Most people have no trouble getting our software up and running, and there is plenty of support available for newbies. We have a growing, active community of more than 150,000 friendly users and developers on our forums eager to help.
"Once Joomla! is installed and running, it is simple for even non-technical users to add or edit content, update images, and to manage the critical data that makes your company or organization go. Anybody with basic word processing skills can easily learn to manage a Joomla! site.
"Via a simple, browser-based interface you will be able to easily add new press releases or news items, manage staff pages, job listings, product images, and create an unlimited amount of sections or content pages on your site."