Cars.com - Visited by more than 11 million car shoppers each month, Cars.
Car Report - Car Reports lets you enter refuelings and other income and expenses of your cars and displays nice reports.
IAAI - IAA Buyer Salvage Auctions app allows you to find your favorite car by browsing an extensive collection or by looking for it in specific auction lists.
Fuelly - Fuelly allows you to tracks your gas mileage over time, helping you calculate fuel expenses as you drive.
TrueCar - Buying a car can be painful.
TruNow - TruNow is a nearest gas station finder and cashback app that gives rewards to its users in the form of gas money.