Sonar is a free app for your iPhone, iPad and iPod that helps you discover if you have anything in common with anyone else in your current location. Sonar shows you how connected to the people around you are by analyzing your Foursquare, Facebook and Twitter networks.
By using publicly available social network information Sonar not only helps you find those that are similar to you in the same area, but also provides a platform to entice conversation. We can sometimes be an introverted society, reducing our opportunities to find new friends. Sonar helps break down that barrier by finding those with similar interests and helps you engage with one another.
You can get your copy of Sonar for free at the App Store.