WinCHM Pro
An easy-to-use help authoring tool.

WordToHelp
Convert Microsoft Word documents to help files..

CHM to PDF converter
Convert CHM file to PDF with covert, TOC, header, footer, etc.

CHM to DOC converter
Convert CHM file to Word Document with covert, TOC, header, footer, etc..

Txt2Htm2Chm
Convert text files into chm file, website help and single html file.