Programmer font surveys show up every couple of months. This one is pretty complete. I had been using Dina for a while, and before that Inconsolata. Recently I installed Droid for no reason other than it came from Google and it was free.

In productivity talks Merlin Mann refers to things like this as fiddling with your work environment as a form procrastination and he's right. Any monospaced font would produce perfectly fine code—but did you see that Ti92Pluspc? So nice. Installing it now…