FILLD - Tap a button and get a tank of gas delivered to your car
Yoshi - Gas magically delivered to your parked car
Fuelio - Track your fill-ups, fuel consumption, fuel costs and save money.
Mileage - A Mileage tracker for an Android-based phone.
Fuelly - Fuelly allows you to tracks your gas mileage over time, helping you calculate fuel expenses as you drive.
FuelPanda - Fuel on demand.