Splend - Rent a new car and drive for Uber
Grabb-It - Location-based ads on your Uber's window
Carve - Rent unbelievable cars from local dealerships
StickerRide - Let your car earn money through advertising
WaiveCar - The world's first all electric and free car-sharing service
Spacewolff - P2P marketplace for ads. Turn excess space into ad space.