phpBB
Create forums or bulletin boards for your website. Set up different groups within your site and discuss all sorts of topics. Talk about anything from business products, travel plans, and lifestyle interests to nightlife guides, recipe forums, restaurant reviews, and community interests.

 

SMF
Set up your own online community within minutes using the powerful custom-made template engine in this professional grade software package.

 

Serendipity
Maintain an online diary with this PHP-powered blog application.

 

WordPress
a state-of-the-art semantic personal publishing platform with a focus on aesthetics, web standards, and usability.

TikiWiki
Build your own Wiki website with these website tools.

 

Moodie (online learning)
Coordinate group activities and share information and documents with this productivity tool.

 

Knowledge Tree
KnowledgeTreeâ„¢ is document management made simple: a simple yet powerful, free, commercial open source and web-based document management system built on the popular open source LAMP stack.

 

Media Wiki
Edit your web pages online and check the results on the spot, without the use of FTP, and work with different users on the same project.

Joomla!
Manage content files with this management tool ideal for web designers.

 

XOOPS
Develop dynamic community websites, intra-company portals, blogs and more with this extensible, OO (Object Oriented), easy-to-use dynamic web content management system written in PHP.

 

Drupal
Publish, manage, and organize a wide variety of content on your website.