Autotrader - Find used cars for sale at AutoTrader.com. With over 3.
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.
AutoScout24 - Used cars and new cars for sale on AutoScout24: The European marketplace for cars: 18 languages...
Fuelio - Track your fill-ups, fuel consumption, fuel costs and save money.
TrueCar - Buying a car can be painful.
Fuelly - Fuelly allows you to tracks your gas mileage over time, helping you calculate fuel expenses as you drive.