StuffIt Expander for Mac

http://my.smithmicro.com/stuffit-expander-mac.html

StuffIt Expander Mac free file extractor can be downloaded separately or as an included feature of StuffIt Deluxe. Expander allows you to access StuffIt files, uncompress Zip archives, and decompress RAR files, TAR, GZIP, BZIP archives, and more.