Free PHP CMS Systems

Geeklog is an open source application for managing dynamic web content. It is written in PHP and supports MySQL, PostgreSQL, or MS SQL as the database backend.

Elefant is an open source content management system that includes a full modern PHP framework for web developers. It uses an MVC approach and PDO libraries for database access.

A free, features rich, Content Management System built with PHP/MySQL and running under many Unixes and Windows.

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 interactive web site using databases. Requires php and an sql database server.

Part blogging tool with cms features based on PHP and MySQL. Supports themes, plugins, multi-user and multiple blogs

Tiki CMS
Tiki is a powerful CMS/Groupware. Features: article, forum, newsletter, blog, file/image gallery, wiki, drawing, tracker, directory, poll/survey & quiz, FAQ, chat, banner, webmail, calendar, category, ACL, etc in Single Sign-on or LDAP.(PHP/MySQL/Smarty)

Mambo Open Source claims to be the finest open source Web Content Management System available today. According to their website there is no need for HTML, XML or DHTML skills, just enter your content, add a picture and then through the easy to use administrator web-interface click and publish.

PROPS is an open, extensible Internet publishing system designed specifically for periodicals such as newspapers and magazines who want to publish online, either exclusively or as an extension of their print publication. PROPS is written entirely in PHP4 using a MySQL database backend, and is free software released under the GNU General Public License (GPL).

phpWebSite provides a complete web site content management system. Web-based administration allows for easy maintenance of interactive, community-driven web sites. Client output from phpWebSite is valid XHTML 1.0 and meets the W3C's Web Accessibility Initiative requirements.

Exponent Content Management System
Exponent is a fully-featured, modern CMS written in PHP, that enables non-technical people to manage and update their websites with minimal effort. Exponent is also an attractive development platform for traditional and non-traditional web applications.

Puzzle Apps
Content Management System developed in PHP, using XSL as templating engine. Use of SQL database (MySql, SQLite, PostgreSQL, soon MSSQL) with ADODB or PEAR::DB as DBAL. *NIX like permission system. You can run many websites in one database.

phpwcms is an Open Source web content management system. It is optimized for fast and easy setup and works on any standard webserver platform that supports PHP/MySQL and was tested successfully on Windows 2000/XP, MacOSX and LINUX

Xaraya is an Open Source extensible content management system. The system allows on-the-fly extensions to the content and user areas which allow greater control and versatility. Coupled with a XSLT style template engine with complete templating of output.

CMSimple is a content management system (CMS), which requires no database. All data are stored in 2 files, content.htm (content) and pagedata.php (page-related data).

XOOPS is a dynamic OO (Object Oriented) based open source portal script 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.

PrattCMS is a PHP Content-Management-System. With a WYSIWYG HTML editor, PrattCMS is really a cobbling together of many different open-source technologies, including the Smarty Templating Engine, the PEAR database scripts, and PHP.