Booster Fuels - On-demand fuel service while you work
Fuelio - Track your fill-ups, fuel consumption, fuel costs and save money.
Yoshi - Gas magically delivered to your parked car
Mileage - A Mileage tracker for an Android-based phone.
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.
FuelPanda - Fuel on demand.