MadCap Flare - Documentation for Any Audience, Language or Format

HelpNDoc - What is HelpNDoc ? Easy to use yet powerful help authoring environment which can generate various documentation formats from a single source.

ClickHelp - Create, translate, and publish technical documentation easily in one portal, anywhere in the world!

ManualsLib - Just enter the keywords in the search field and find what you are looking for!

Adobe RoboHelp - Adobe RoboHelp empowers organizations to deliver engaging help and policy content across mobile devices, formats, and platforms.

Manuzoid - Repository that includes user manuals for various products