I'm fiddling with getting LWP's HTTP::Cookies::Netscape to read Mozilla cookies files. I'm writing back and forth with the Mozilla developers about an apprently inadvertent change in the file format since NS4. It think it's a very good thing for people in different kinds of open source development to have at least some kind of contact with eachother, so we know what a great big wide world it is. (BTW, would anyone find a HTTP::Cookies::MSIE class useful?)
An idea I had recently: some of my Perl stuff is Perl-specific (like Pod::Spell or strict::ModuleName), but most of it could be easily translated to other languages. Something like HTML::TreeBuilder would be a major undertaking, since it's so massive and messy, but Lingua::EN::Numbers::Ordinate would be a snap to translate into any language; ditto MIDI-Perl, Time::Duration, or Text::Unidecode.
But I've gotten exactly zero mail about such translations, ever. If you know someone who writes Open Source software in some other language, and is looking for something to do, tell them they can start out by translating some of my stuff into their favorite non-Perl language.