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.
Delempty - Clean out empty files and folders
File Roller - File Roller is an archive manager for the GNOME desktop environment.
4dots Free PDF Password Remover - 4dots Free PDF Password Remover can remove a password from a PDF file.
Bandizip - Bandizip : All-In-One Free Zip Archiver. Bandizip is a lightweight, fast and free All-In-One Zip Archiver.
ZTreeWin - ZTreeWin is a fast and powerful text-mode file & directory manager, with many advanced features...