The Italian Navy has published some very nice photos of COMSUBIN operating various underwater vehicles. None of these types are thought to be operational with the unit, but excellent photography.

Jetboots
Diver propulsion device made by Patriot 3, USA. Note the small propulsors attached to the diver's leg:
Manufacturer's website

BlackShadow 730
Diver propulsion vehicle made by Rotinor, Germany.
Manufacturer's website

DPD
Diver propulsion vehicle made by Stidd, USA. This is an early model not the current improved version.
Manufacturer's website