Take back your commute with these five fuel-saving apps that will help you avoid traffic jams, optimize driving habits and save some cash at the pump. Smart drivers, rejoice! GasTrax
GasTrax works by utilizing the GPS on your Apple device to calculate speed, distance traveled, number of stops and how many CO2 emissions your car produces on each trip.AutomaticThis soon-to-be-released hardware and software package promises to help you reduce fuel use, monitor and clear check engine lights, extend the life of your car and even find it when it’s lost in a parking lot (again).
More here: http://earth911.com/work/fuel-gas-saving-apps/