This is the very finest pitch rackmount pitch shifter and pitch-effects processor for guitar or studio in the world, and it also does multi-effects (also comes in a multichannel version):
http://vintageking.com/eventide-h7600
This pedal is to my mind the finest pitch shifter processor pedal, and it also does multi-effects:
http://vintageking.com/eventide-h9-harmonizer-effects-pedal
This one specializes in pitch:
http://vintageking.com/index.php/catalog/product/view/id/10129/
All are controllable via MIDI, and many functions are controllable as well with expression pedals and foot switches. Eventide put pitch effects on the map.