Geeklog

Geeklog is a web blog powered by PHP and MySQL.

MamboOpenSource

Mambo is a Content Management System (CMS).

Nucleus

Nucleus CMS is an advanced blogging platform.

PHP-Nuke

PHP-Nuke is an advanced content management system.

PostNuke

PostNuke is a community, content, collaborative management system, a C3MS.

WordPress

WordPress is publishing software with a focus on ease of use, speed and a great user experience. WordPress is blessed with an active community, which is the heart of open source software.

Xoops

XOOPS is a dynamic OO (Object Oriented) based open source portal system written in PHP.

b2evolution

b2evolution is probably the most comprehensive blog engine you could find, with an unique set of features

e107

e107 is a portal or content management system powered by PHP and mySQL.

Advanced Guestbook is a PHP-based guestbook script.

InvisionBoard is a web bulletin board system.

PhpWiki is a site script where everyone can collaborate on the content

osCommerce is an easy to use and configure shopping cart system.

phpBB

phpBB is an Open Source bulletin board package.

Coppermine

Coppermine is a photo image gallery.

cPSupport is a support ticketing system.