[ Thanks to Chris7mas for this link.
]
“PeaZip is an open-source file archiver with GTK and Qt
interfaces, with support for all the major archives out there,
including gzip, 7z, bzip2, zip, and arc.“To install it in Ubuntu 11.04, download the DEB package from
here then open a terminal, make sure the current working directory
is the one where you saved the .deb file, and type in the following
command:”