statuspage - A simple self-hosted status page site with an API written in Django under the BSD license.
HelpNDoc - What is HelpNDoc ? Easy to use yet powerful help authoring environment which can generate various documentation formats from a single source.
YUNO - YUNO is a web data driven company focussed on solving customer challenges in web data discovery and extraction space.
HelpSmith - HelpSmith is a help authoring tool to create CHM HTML help files, manuals, and PDF documents.
Yonyx - Decision tree driven Interactive guides for customer service
Adobe RoboHelp - Adobe RoboHelp empowers organizations to deliver engaging help and policy content across mobile devices, formats, and platforms.