Duplicate Images

I need a duplicate image finder. Recently I've been using zsDuplicateHunter Pro for Checksum duplicates. A shameless-money-scheme program but it's a very conscise and does the job well. However, since the average 4chan/Internet user agrees there's no such thing as too much jpeg; I've been using Dup Detector aswell. The problem is that it's very very painful to wade through a large collection if pictures with it's GUI. I was using Odin Proffesional before, but the limitations really shit me and there are no cracks.

So what do you use?

Behold, gentlemen! The monthly what-should-I-use-to-find-duplicates question!