BioPerl <http://bio.perl.org/> is a nice set of Perl modules (not scripts, BioPerl is useful for developers only) to deal with various biological problems.
Debian developers will be pleased to learn that BioPerl is a cooperative and anarchistic effort. I subscribed to the debian-perl mailing list (it is my first Perl-module package) and I hope we'll see a documentation on the packaging of such modules soon. The licence is Artistic, as Perl itself. -- http://www.debian.org/~bortz/
