I’ve been searching the web for different programming fonts since the beginning of times it seems, so I can tell you that this website has gathered most of them: http://www.s9w.io/font_compare/. There are some I have in my collection which are missing, but the authors seem to update their website with new tips, and provide a very useful preview mechanism.
Also here are some useful links to downloading those fonts: http://programmingfonts.org/list
Actually, that last website has it’s own web app for directly testing those fonts: http://app.programmingfonts.org/