PhpWiki  

A WikiWikiWeb is a web site where anyone can edit the pages through an HTML form. Linking is done automatically on the server side; all pages are stored in a database. This may sound rather simplistic, but a Wiki is a very unique way to collaborate on the Web. The addictive quality of a Wiki is that making pages is as simple as making a link to them. If they don't yet exist, the page link will be followed by a hyperlinked question mark; follow that link and you can define the new page.

Price: Free

   Sitebox  

SiteBox is a PHP based web site content management system developed with speed and flexibility as the forefront objective. SiteBox is unique in that allows administrators to manage a network of websites from the one location. SiteBox admin can also be installed on a separate URL for added security. Every bit of functionality on a SiteBox site is a separate module that is loaded, controlled and displayed by the core system. On it's own the core system does nothing. This means that you are in complete control of your site. If you don't like the way a module works you are able to rip it out, write your own version and plug it back in. If there is a feature you don't need you can get rid of it just be removing the module.

Price: Free

   Terracotta Project  

PHP based lightweight, ready to run, extremely customizable document management product integrated with a single manager management interface allowing you to manage Articles, Documents, Links, Images, and Folders.

Price: Free

   Cached Fast Template  

System that implements caching for the PHP FastTemplate module. Features: Supports lock files, so long operations will not allow pages to be served only "half" cached. Most important on heavily loaded machines. Allows caching to be decided when the cache is being tested, not written to. This means that caching policies can be easily changed. Blocks can be cached seperately, meaning that different parts of the page can be cached for different amounts of time, or not cached at all. Allows caches to be invalidated on an event basis. (Every half hour, on the half hour, for example.) Allows caches to be invalidated on a time bases. (After 45 seconds, for example.) Handles dynamic blocks and normal blocks without a problem. Intelligent cache naming, allowing the most flexibilty with caching.

Price: Free

   AlberT-EasySite  

Powerful Framework for easy generation of full-featured web sites, with particuar attention to graphics, security and coding style.

Price: Free

   PHPX  

PHPX is a web portal system, blog, Content Management System (CMS), forums, and more. PHPX is designed to allow everyone to be able to have feature rich, interactive websites even if you do not know a bit of programming. Some key features include fully integrated forums, downloads, image gallery with slideshow and auto-thumb nailing, support ticket system, GUI interface for web page content management, news with topics and instances and a whole lot more. PHPX allows you to fully customize the look of your site. No more being constrained within restrictive layouts, you say how you want your site to look and PHPX does the rest.

Hosting Requirements: *nix; Apache; PHP 4.0.6+
Database: MySQL 3.23.23+
Price: Free

   open-medium CMS  

open medium CMS is a free content Managment system, which does not leave desires open by its modularity, open-endedness and flexibility. Typical users are beside Web webmastern and Web producers likewise Web agencies, which would like to offer its customer trend-setting technique already today. open medium CMS was developed as (Web) content Managment system to create and maintain as easy as possible Web sites over the Net. It seperates strictly between appearance (Templates) and the content, the output can be placed at every media.

Hosting Requirements: Linux, FreeBSD, Windows
Price: Free

   vLib  

vLIB is a php library with classes to help simplify the creation of real-world applications and websites. It is the home of the popular vlibTemplate class, used for splitting logic and design for websites, features include a caching class, a debugging class, template includes, loops (blocks), template conditional statements, variable escaping/formatting and more. .

Price: Free

   Portunity Portalsuite  

With the Portalsuite 2002 you build up complete internet presentations with your own editorial system (Content Management Software). Alternatively you can also use the Portalsuite 2002, especially the Light version, to integrate existing home pages step by step – for instance by migrating merely the start page onto the Portalsuiteand then using the advantages of dynamic content management there.

Hosting Requirements: PHP
Database: MySQL
Price: Free

   yaapi (Your Article API)  

yaapi is a programming interface that makes displaying articles on your webpage easy. You can use the yaapi class to retrieve, post and edit articles. You have the freedom to design the front-end to look however you want. A basic admin front end is included. One of the main features is the ability to divide articles into pages using yaapi's special tags.

Price: Free