Developing HTML Help  
   Presents a technical overview of HTML Help and a tutorial on adding HTML Help content to a web page. (Joe Welinske / PC Magazine)
   http://www.zdnet.com/pcmag/issues/1620/pcmg0031.htm

HTML Help Center  
   The HTML Help Center contains the results of the research conducted in the area of Microsoft HTML Help by Delmar Computing Services of Tipton, Michigan. Developers and help authors will find high-quality samples, source code, and tools for working with HT
   http://mvps.org/htmlhelpcenter

HTML Help - Using Merge  
   Tutorial on getting merged CHM files working correctly. By The Helpware Group.
   http://www.helpware.net/htmlhelp/how_to_merge.htm

HTML Help - Context Help Ids  
   Tutorial on setting up contextual help IDs. By The Helpware Group.
   http://www.helpware.net/htmlhelp/how_to_context.htm

New HTML Help Standard  
   A technical overview of the HTML Help standard from a C/C++ developer's perspective. (Keith Bugg / C/C++ Users Journal)
   http://www.cuj.com/articles/1998/9808/9808d/9808d.htm

Microsoft HTML Help Site  
   The official HTML Help site with documentation, editors, and viewers. (Microsoft)
   http://msdn.microsoft.com/library/default.asp?URL=/library/tools/htmlhelp/chm/hh1start.htm

Help Consultants  
   Resources, downloads, links, and tutorials on the use of Help Authoring software.
   http://www.magrino.com

Microsoft standard compiled HTML Help from Armada  
   Armada, UK based team of technical authors producing up-to-the-minute, Microsoft standard, context sensitive, compiled (chm) HTML help . . .
   http://www.microsoft-html-help.co.uk