Wikipedia
GasBuddy.com
GasBuddy is a tech company based in Boston, MA that operates apps and websites based around finding cheap gas in an area. They also offer software solutions to convenience store owners via their B2B initiatives (formerly known as OpenStore).
The GasBuddy app is a GPS-based application program for smartphones and tablets which provides prices of nearby gas stations from user-submitted data, as well as through partnerships with other companies and directly from station operators. The app supports Android, iPhone, iPad, BlackBerry, and Windows Phone.