CHM Editor - Best solution to edit CHM files
Cool Reader - Fast and small cross-platform eBook reader for desktops and handheld devices
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.
Gitden Reader - For those book readers who want a flow while reading their favorite books via their smartphones will surely like using this application because this simple book reading app has lot of reading features offer to them.
ExtraCHM - A fully featured reader for Compiled HTML (chm) documents.
FBReader - FBReader is an e-book reader for various platforms. Features: