As mentioned earlier in the thread: http://s9w.github.io/font_compare/
It also has anti-aliasing enabled on fonts that support it, which I personally hate. Proggy Tiny is designed to be pixel perfect at small sizes. MonteCarlo looked similar to Proggy Tiny, but when I typed MonteCarlo's example[1] into my editor and compared to Proggy Tiny[2] I really disliked it. That shows why you really need to see it with real source code in an editor at the same size.
Thanks for the link though, it's a good resource to see some of what's available!
[1] http://www.bok.net/MonteCarlo/java-example.html
Edit: totally didn't notice it has a compare mode, and that you can change sizes and turn anti-aliasing off. This thing is sweet!