The official pad that comes with DanceDanceRevolution on PlayStation 3. Though to get the PS3 DualShock 3/SIXAXIS controllers to work, you needed special drivers. As for the pads, they work like a generic USB device, so no drivers are needed, and is detected as "DDR Mat for PlayStation(R)3". So far I only tested it on StepMania 3.9b and StepMania 5.0 alpha 1a on Windows XP, and has worked, so as far as compatibility for newer StepManias yet to come and/or Windows OSes past XP (Vista/7), this may vary.
product_name=Official PS3 DDR Dance Pad
info_type=Information about a new, unlisted adapter or pad