Mambo is a full-featured content management system that can be used for everything from simple websites to complex corporate applications.

PHP-Nuke is a news automated system specially designed to be used in Intranets and Internet. The Administrator has total control of his web site, registered users, and he will have in the hand a powerful assembly of tools to maintain an active and 100% interactive web site using databases.

eZ publish is a world leading Open Source Enterprise Content Management System and development framework. eZ publish includes advanced functionality for web publishing, intranets, e-commerce and more. eZ publish has been downloaded more than one million times from ez.no stating the international success the system has achieved since the first release in 1999. Thousands of enterprises, governmental offices, non-profit organizations, small and middle sized companies and educational institutions around the world trust eZ publish for running their web solutions.

e107 is a content management system written in php and using the popular open source mySQL database system for content storage. It's completely free and totally customisable, and in constant development.

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.

Exponent is a website content management system (or CMS) that allows site owners to easily create and manage dynamic websites without necessarily directly coding web pages, or managing site navigation.

XOOPS is an extensible, OO (Object Oriented), easy to use dynamic web content management system written in PHP. XOOPS is the ideal tool for developing small to large dynamic community websites, intra company portals, corporate portals, weblogs and much more.

Geeklog is a PHP/MySQL based application for managing dynamic web content. "Out of the box", it is a blog engine, or a CMS with support for comments, trackbacks, multiple syndication formats, spam protection, and all the other vital features of such a system.

TYPO3 is a free Open Source content management system for enterprise purposes on the web and in intranets. It offers full flexibility and extendability while featuring an accomplished set of ready-made interfaces, functions and modules.

Drupal is software that allows an individual or a community of users to easily publish, manage and organize a great variety of content on a website. Tens of thousands of people and organizations have used Drupal to set up scores of different kinds of web sites. Drupal is open source software licensed under the GPL, and is maintained and developed by a community of thousands of users and developers.