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.
zpaq - Incremental Journaling Backup Utility and Archiver
Engrampa - A file archiver for MATE, based on File Roller from GNOME 2 http://www.mate-desktop.org/
FreeArc - FreeArc is a free and open source file archiver developed by Bulat Ziganshin.
ArKiwi - A lightweight and very fast file archiver, where you can add, compress, extract, delete, password protect, and blazing fast search all your files.
atool - atool is a script for managing file archives of various types (tar, tar+gzip, zip etc)