1)   WinCHM [help authoring tool] 3.511
Help authoring software. Create Help file, Create Web-based help, Create CHM file, Create printable pages, Create PDF manual easily and quickly. Two versions: WinCHM Pro and WinCHM (Standard)

 2)   HelpSmith 2.0
HelpSmith is an innovative help authoring tool allowing you to create CHM HTML Help files, Web Help, and Printed Manuals from the same source help project.