Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
HelpNDoc - What is HelpNDoc ? Easy to use yet powerful help authoring environment which can generate various documentation formats from a single source.
HelpSite - HelpSite is a simple service to help your setup the perfect support centre or help site.
Dr.Explain - Dr.Explain software is a help file authoring tool.
Manula - Manula is an online software for creating user manuals.
CHM Editor - Best solution to edit CHM files