Bandizip - Bandizip : All-In-One Free Zip Archiver. Bandizip is a lightweight, fast and free All-In-One Zip Archiver.
HelpNDoc - What is HelpNDoc ? Easy to use yet powerful help authoring environment which can generate various documentation formats from a single source.
The Unarchiver - Get the top application for archives on Mac. It's a RAR extractor, it allows you to unzip files, and works with dozens of other formats.
Dr.Explain - Dr.Explain software is a help file authoring tool.
File Roller - File Roller is an archive manager for the GNOME desktop environment.
CHM Editor - Best solution to edit CHM files