phpMyFAQ - phpMyFAQ is a world’s most popular mobile-friendly, feature-rich and open-sources FAQ software that uses PHP 5.
HelpNDoc - What is HelpNDoc ? Easy to use yet powerful help authoring environment which can generate various documentation formats from a single source.
iService - iService is an integrated solution for managing all customer interactions with complete web-based interface, routes and automatically responds to customer email, provides a simple but powerful knowledge base, and includes a complete contact manageme…
Dr.Explain - Dr.Explain software is a help file authoring tool.
HelpDocs - Educate your users with a super simple knowledge base that’s built for teams just like yours.
MadCap Flare - Documentation for Any Audience, Language or Format