Live support for your website. Featuring web and desktop clients. XMPP notifications support including GTalk, Android, IPhone. Enables interactive live chat for customers support.
phpMyFAQ is a multilingual, completely database-driven FAQ-system based on PHP and MySQL. phpMyFAQ also offers a Content Management-System with a WYSIWYG editor and an image manager.
osTicket is a widely-used and trusted open source support ticket system. It seamlessly routes inquiries created via email, web-forms and phone calls into a simple, easy-to-use customer support platform.
MediaWiki is a free and open source software wiki package written in PHP, originally for use on Wikipedia. It is now also used by several other projects of the non-profit Wikimedia Foundation and by many other wikis.
OpenSupports is a support center for your website. You can create staff members who will help you to answers user's tickets. Also, you can have an articles library for your users.
Question2Answer is a free PHP/MySQL solution for social Q&A sites (like Stack Overflow or Stack Exchange) with the following features: Five minutes to install, Easy styling with CSS themes...
Hesk allows you to setup a ticket based support system for your website. Your customers are able to submit support tickets and the staff has a nice web based interface to reply to and manage tickets.
DokuWiki is a standards-compliant, simple-to-use Wiki mainly aimed at creating documentation of any kind. It is targeted at developer teams, workgroups, and small companies.
LionWiki is minimalist file-based, templatable, extensible wiki engine which works from just one file. It's intended for small personal websites, notebooks and other simple applications.
An easy to use, feature-rich help desk system compatible with desktop and mobile devices. Guests and registered users can browse a knowledge base and submit tickets via web forms or email.
HelpDeskZ allows you to manage your site's support with a web-based support ticket system. Categorize tickets into groups to organize tickets and assign agents to groups to manage tickets.
LiveAdmin Lite is the Free version of the powerful live chat software, still has tons of features and best of all, it's free. Multiple languages supported at client side.
Help desk software is vital to the success of your help desk and customer support staff. Tracking and responding to help desk calls is faster and more efficient when using well designed help desk software.