ZenHelp
With ZenHelp you can create HTML help files with just a few clicks. The power of Microsoft Word together with the intuitive and feature rich ZenHelp add-in will get you started creating HTML help files within just a couple of minutes.

chm2web
chm2web is a tool for on-the-fly conversion of compiled HTML Help (.chm) files into ready-to-publish web pages.

word to chm
This software can quickly convert a word document to a help CHM file, according to the outline structure generated chm file, and html sites.

Word to Web Help Ultimate 2011
Word-2-Web is a perfect WebHelp software converting Word doc/docx to online help and manual. Word-2-Web can converting doc or docx to Web help and creating Web help system from Word doc/docx in seconds

WinCHM - help authoring software
Create help files, Make CHM files, Create a help file, write help files easily.

TechWriter for Web Services
Document your Web Services like a Pro! TechWriter for Web Services is the fast and easy way to generate accurate and professional looking documentation for web services.

HelpBuilder
HelpBuilder - creates help files for Windows 9x, ME, NT, Win2000, XP.

Help Documentation Creator
Help documentation creation software content editor add edit remove items open text popups from external html help file browse groups create help topics sequences works with multiple projects in multi-file mode for windows XP Vista operating system

DzSoft WebPad
DzSoft WebPad is a simple and extensible HTML editor with PHP and JavaScrip syntax highlighting. Features one-click preview in built-in browser, the HTML Tidy tool from the World Wide Web Consortium to format and cleanup your HTML code and much more.

fpHelp Builder for SharePoint Designer
fpHelp BuilderSP is a simple Microsoft SharePoint Designer add-in that allows the conversion of a web site to a Microsoft HTML Help file (CHM file). The ability to work with SharePoint Designer is enough to construct the Help file from any web site.