I do apologize for missing that one -- and rule 110, which QM mentions below and which came to my mind just today when I thought of Conway Life (and then of this poll) again.

Others are missing, too, notably boolean logic circuits, various kinds of automata, Boltzmann machines, Conway's FRACTRAN (yes, that's the same Conway), and many more. Even diophantine equations can be coaxed to yield a model of computation.

Mea culpa, fellow monks! Accept my apologies, after all I'm just a silly pony.