Allright I have a few of these picks, so I'll put 'em up every now and then..Here's my first one: Monolingual.
Heres what they say on their site:
Seriously, its really useful, gets you a couple of gigs of free space, just like that.
I don't know about you, but I use my computer in only one (human) language — English. And I'm willing to bet that you do too, albeit perhaps not English. So why do you have a bunch of localization files for the Mac OS X operating system filling up your hard drive? Enter Monolingual — a handy utility for reclaiming your space for more useful things… like international mp3 files, email or whatever you like.
Heres the link: http://monolingual.sourceforge.net/