Perl modules can be found on cpan.org (easily using CPAN.pm), of course, but there are some lmitations on windows. Luckily, ActivePerl contains a cute program called ppm (have a look in the installation directory) that will install pre-built packages from PPM-Repositories. One repository will already be stored, the Activestate one and you'll find more. (I know that at least one Perlmonk hosts such a repository, but i don't remember who it is, sorry).