I've just added a port of GNU Tar to http://smedley.info/os2ports
GNU tar is an archiver that creates and handles file archives in various formats. You can use tar to create file archives, to extract files from previously created archives, store additional files, or update or list files which were already stored.
See the included readme.os2 for some tips on easily opening .tar.gz and .tar.bz files
Cheers,
Paul.
Source: Paul Smedley