HelpScribble 

Full-featured, easy-to-use help authoring tool for creating WinHelp (.hlp), HTML Help (.chm), a printed manual and online documentation (on a web site) from the same source, from start to finish. Can import help files created with another tool.
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WinCHM [help authoring tool] 

A html help authoring software that help you create help file easily and quickly.
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Help Development Studio 

Help Development Studio is a popular, full-featured, stand-alone help authoring tool, which is designed to create WinHelp, HTML Help, and Web Help files from the same source. Download your free trial copy now!
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Help & Manual 

Help & Manual is a stand-alone authoring tool with an integrated WYSIWYG editor. It creates all types of standard help files: * HTML HELP * Winhelp (.hlp) * Browser help * PDF manuals * E-Books (for CD presentations) * Printed user manuals
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QuickHelp - HtmlHelp - WebHelp 

The modern generation for the production of html help an product documentation´s With QuickHelp you create your product documentation´s quick an easy. The pros against html work shop, robohelp and other´s:
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E.S.T. Help Author Pro 

EST Help Author Pro creates the most popular help formats from a single source It supports the following output formats: Ansi Text Manual, Unicode Text Manual, RTF Manual, HTML Manual, HTML Web Help, Windows Help, CHM Help, Electronic Book (EXE)
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