RiverSimple Open-Source Hydrogen Car

Key points of the press release indicate the car is powered by a 6 kW fuel cell (8 hp) and that it is networked with ultracapacitors, to absorb energy from regenerative braking (a la F1 KERS).

However, as I previously said, whether hydrogen-powered vehicles can be successfully commercialized at this point is debatable, but I am convinced the concept of open source automotive development and (more) localized or decentralized production is definitely going to take off.