With today's skyrocketing gas prices, it certainly helps to know where to find the cheapest gas station in your area. With GasApp on your iPhone, simply punch in a ZIP code and you'll get a list of gas stations in the area and their gas prices per gallon. There's even a map graphic you can touch to find the best way there.
iPhone link: http://www.gasapp.com/new.html
Web site link: http://www.gasapp.com/