Good source for freeware/gpl/etc applications?

I'm sure I'll receive some flak for this, but I enjoy having lots of random applications to mess around with, as I spend a majority of my computer time offline. I'm wondering if anyone could direct me to a good source for freeware/GPL applications specifically for Mac? I know you can run some in X11, but I'd rather go with Mac-specific ones.

And yes, I know about the downloads section on the Apple website.

Btw, I'm running 10.6.2, if that makes any difference to anyone.

It's hard to name FOSS applications for you if we don't know what you're looking for. What are you looking for?

Please use the Search Feature.
There are already several threads that offer some very helpful suggestions and answers for this question.

download.com, downloadsquad.com, lifehacker.com. All of them have intuitive Mac sections or posts.