In our Lab, we build lots of WordPress themes on regular basis and following the WordPress theme standard is very necessary. WordPress codex have a checklist for the same but it’s not in organized form.
Cadoo of Chitich.com has come up with a .pdf version of WordPress Theme development checklist which I believe every theme developer should download. This checklist is same as WordPress codex checklist but in more organized form. Here is a screen preview of this Theme checklist .pdf file.
You can download this .pdf file from the official page. Also check out 15 WordPress cheat sheet for developers.
Do you develop WordPress themes? If yes, do let us know what checklist do you follow?