Carfax - CARFAX Vehicle History Report can help you avoid buying used American Cars with hidden problems. Visit the official CARFAX Website for Europe here
GasBuddy - GasBuddy lets you search for Gas Prices by city, state, zip code, with listings for all cities in the USA and Canada. Updated in real-time, with national average price for gasoline, current trends, and mapping tools.
AutoFax - AutoFax - vehicle history report (VIN check) for used cars
Fuelio - Track your fill-ups, fuel consumption, fuel costs and save money.
VinDecoderz - Get the complete vehicle history report with owner information, prior accidents and damage.
Fuelly - Fuelly allows you to tracks your gas mileage over time, helping you calculate fuel expenses as you drive.