is a unarchiver App for zip, tar, rar, 7zip, stuffit & more for Mac X systems: Command line tools for Unarchiving rare format archives for Windows/Linux/Mac OS X NOW Available!!
The Unarchiver is an Objective-C application for uncompressing archive files.http://code.google.com/p/theunarchiver/
Supports more formats than I can remember. Zip, Tar, Gzip, Bzip2, 7-Zip, Rar, LhA, StuffIt, several old Amiga file and disk archives, CAB, LZX, stuff I don't even know what it is. Read the wiki page for a more thorough listing of formats.
Copies the Finder file-copying/moving/deleting interface for its interface.
Uses the character set autodetection code from Mozilla to auto-detect the encoding of the filenames in the archives.
Supports split archives for certain formats, like RAR.
Version 2.0 uses an archive-handling library built largely from scratch in Objective-C, which makes adding support for new formats and algorithms very easy.
Uses libxad ( http://sourceforge.net/projects/libxad/ ) for older and more obscure formats. This is an old Amiga library for handling unpacking of archives.
Work is being done on making at least the unarchiving engine itself multi-platform. Done! Command line tools for Unarchiving rare format archives for Windows/Linux/Mac OS X are NOW Available!!