DisplayFusion - DisplayFusion will make your multi-monitor life much easier.
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.
WindowGrid - Quickly and easily layout windows on a dynamic grid using just the mouse.
Fuelly - Fuelly allows you to tracks your gas mileage over time, helping you calculate fuel expenses as you drive.
Mizage Divvy - Divvy is an entirely new way of managing your workspace.
Fuelio - Track your fill-ups, fuel consumption, fuel costs and save money.