WinCHM - Creating CHM file, Make CHM file, Web Help. WinCHM Pro - Help authoring software (CHM, WebHelp, DOC, PDF) . With this powerful tool you can not only create chm file from scratch, but also convert a set of existing HTML files to a chm file.
CHM Editor - Best solution to edit CHM files
Read CHM - Read CHM is ultimate CHM (Compiled HTML Help) file reader.
ExtraCHM - A fully featured reader for Compiled HTML (chm) documents.
Microsoft HTML Help - Microsoft HTML Help is the standard help system for the Windows platform.
GnoCHM - GnoCHM is a CHM file viewer. It is designed to integrate nicely with Gnome.