Windows Clipboard Replacement?

I was wondering if you guys have any advice on clipboard replacements for xp. I would like it to support more than one item (obviously!), and I would like to be as small and unobtrusive as possible (I do not want a large window with lots of mouse clicks; rather a menu). I do not mind if it is not open source, as long as its freeware (although open source would be nice). Any suggestion would be greatly appreciated.

Works nicely and is open source