CHM Editor - Best solution to edit CHM files
Support Hero - Educate your customers through self-help support
WinCHM - Creating CHM file, Make CHM file, Web Help. WinCHM Pro - Help authoring software (CHM, WebHelp, DOC, PDF) . With this powerful tool you can not only create chm file from scratch, but also convert a set of existing HTML files to a chm file.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
ExtraCHM - A fully featured reader for Compiled HTML (chm) documents.
HelpSite - HelpSite is a simple service to help your setup the perfect support centre or help site.