phpMyFAQ
A project using Symfony components
phpMyFAQ is a multilingual, database-driven FAQ-system. It supports various databases and PHP 5.2 (or higher). phpMyFAQ also offers a multi-language Content Management-System with a WYSIWYG editor and an Image Manager, flexible multi-user support with user and group based permissions, templates, PDF-support, Facebook and Twitter support, LDAP and Microsoft Active Directory support and an easy to use installation script.
Official website: phpmyfaq.de