1)   WinCHM [help authoring tool] 3.5
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 1.0
The HelpSmith's ultimate toolkit with its visual approach takes the process of writing HTML Help files for your software applications to a new quality level.