Dr.Explain - Dr.Explain software is a help file authoring tool.
GitBook - Modern Publishing, Simply taking your books from ideas to finished, polished books.
HelpNDoc - What is HelpNDoc ? Easy to use yet powerful help authoring environment which can generate various documentation formats from a single source.
Docusaurus - Easy to maintain open source documentation websites
HelpSmith - HelpSmith is a help authoring tool to create CHM HTML help files, manuals, and PDF documents.
TKO Software - TKO Software offers Policy Guides cloud based software system for businesses and organisations of any size to help them document and share their policies and procedures with their staff.