While you’re out and about, you’ll want to make sure that you have plenty of gas to get from store to store. “Gas Buddy” is a great app to help you find the best prices for gas in your area. It uses information submitted by other users as they gas up. If they find a great price for gas, they post it to “Gas Buddy,” and you reap the benefits. “Gas Buddy” is available on iPhone, Android, Windows Phone, and Blackberry.