CS Live Helper
A multi-user, multi-operator, multi-department live Help support chat system that allows the operators of the websites to monitor their visitors as they are browsing the site and proactively open a chat session with the visitor.
Homepage: http://www.craftysyntax.com/livehelp/
helpcenterlive
Help Center Live is a `Live` help desk system written in PHP using a MySql database backend that features Live Support, Trouble Tickets and FAQ within one project.
Homepage: http://www.helpcenterlive.com/
Support Forum: http://www.helpcenterlive.com/forum/
phpMyChat
phpMyChat is an easy-to-use multi-room chat based on PHP and a database.
Homepage: http://phpmychat.sourceforge.net
Documentation: http://phpmychat.sourceforge.net/rubrique.php3?id_rubrique=2
phpMyFAQ
phpMyFAQ is a multilingual, completely database-driven FAQ-system. For the time being a MySQL database (support for other databases is under development) is used to store all data, PHP 4.1.0 (or higher) is needed in order to access this data. phpMyFAQ also offers a Content Management-System, flexible multi-user support, a news-system, user-tracking, language modules, templates, extensive XML-support, PDF-support, a backup-system and an easy to use installation script.
Homepage: http://www.phpmyfaq.de/
Documentation: http://www.phpmyfaq.de/dokumentation.1.4.en.php