Stockfish 5 was released yesterday: http://stockfishchess.org/ http://stockfishchess.org/ As mentioned elsewhere in this thread, Stockfish is just an engine -

Stockfish 5 was released yesterday: http://stockfishchess.org/ http://stockfishchess.org/ As mentioned elsewhere in this thread, Stockfish is just an engine - you must install a GUI separately. XBoard is well known, but there are better alternatives: http://chessx.sourceforge.net/ http://chessx.sourceforge.net/ http://scidvspc.sourceforge.net/ http://scidvspc.sourceforge.net/