Auto Escape: Worldwide reservation center, for any country. No online booking.
Auto Europe: Provides car rentals, flight tickets, hotels, and specialty cars. Offers prices in a number of currencies. Cellphone hire available to US residents.
BreezeNet: Online booking of discount rentals at major airports, worldwide.
Car Rental Express: Offers online rentals from independent agencies in many world cities and airport locations.
CarRentals.com: Offers worldwide service from several suppliers' inventories.
Holiday Cars Direct.com: Providing rentals multiple countries including USA, Spain, UK, Portugal, France and Italy. Online booking available.
Ofran Holiday Autos: Broker, providing vehicles at many locations worldwide, providing information on destinations and an online reservation system.
RentalCar.com: Worldwide reservations. No online booking.
Skycars: All-inclusive online car hire for the USA, Europe and Australia.
Transhire World Wide: Offers car rentals worldwide.
U.S. Rent A Car: Car hire consolidator offering fully inclusive USA car rental services to UK and European tourists.