Only Rybka and Naum are above Stockfish in rating, even last versions of fritz, hiarcs etc are weaker.
You get a zip, uncompress and you will find a folder with the engine for each SO. I only added the mac version of stockfish 1.6.2 (this engine is based on glaurung)
Enjoy this GPL engine, the stronger one!
Other OS and more info herer: http://www.chess.com/download/view/stockfish-16