deco is a command-line program that, together with the deco-archive package, allows you to extract dozens of popular archive file formats. It has a consistent interface ("deco 1.tar.bz2 2.rar 3.zip 4.flac 5.deb") and consistent behavior (never deleting archives after extraction and extracting relative to the current working directory, just verbosely enough, all unless explicitly requested otherwise). It creates an extraction directory if there is more than one file or directory at the archive top level, and it is able to fix strange permissions.
Re: See also
There are lots and lots (http://hartlich.com/deco/similar/).