The Proggy programmer fonts include Proggy Clean, Proggy Square, Proggy Small, and Proggy Tiny in addition to a number of contributed programming fonts like Crisp, Speedy, CodingFontTobi1, and Opti. The fonts are all fixed-width screen fonts that are designed for code listings.

The fonts were originally created by hex-editing a bitmap .fon file of the correct dimensions. Later, to create the truetype variants, I found a Ruby script that was able to perform the conversion for me. All it did was draw little squares for each pixel. That's why the fonts are not suitable for anti-aliasing or clear-type.

The fonts are downloadable from the original site
or you may grab them from a mirror that was set up.