HelpNDoc
HelpNDoc provides a clear and efficient interface to build the most amazing html help files without worrying about the inner working of help file generation. Just enter your text in the built-in word processor, hit the "Compile" button and it's done!
ClipCollect
Website Builder: Convert any directory contents of your hard drive to HTML with 3 mouse clicks. Collect, edit and autoformat text snippets and save them along with any other files into a directory structure that gets converted automatically to HTML
HelpExplorer Linux
HelpExplorer is a full-featured help viewer for both Windows and Linux. One of its main advantages is 100% support of the WinHelp (.hlp), MS HTML Help 1.x (.chm) and MS Help 2.0 (.HxS) help file formats that are widely used in Windows
Helptrix
Helptrix is a help authoring system for creating professional help and manuals in several formats from a single source. Publish your manuals as PDF, HTML Help or as HTML with a single click, translate and maintain multi-language help systems.