I have an idea or two for this, but I'll need a bit of input on the concepts. 

Animalistic Races - basically anthropomorphics, but what about wings and tails? does that adhere to the 'no special powers' rule or is that too many limbs?
AI - I've yet to see a definitive answer, but would they be acceptable if they're contained within humanoid chassises?
Cyborgs - A stable part of sci-fi, how far along are cybernetics/prosthetics? can yet perfectly replicate a human limb or even out-perform them?