The year isn't over yet but lists are being compiled as we type. (Most will be updated by year's end.) So if you cannot move because once again you ate too many sweet & spicy almonds, erm, some links below. (Top tip: make the almonds, just give most of them away. xoxo)
Kottke is an excellent source for photography in general; year-end lists specifically.
You can get lost in National Geographic's Photography section. Galleries galore. Fantastic.
The Guardian's best photographs of 2012 is a small but good list; not sure if it's a final cut though.
(vintage photograph via From London with Love)