'Nike+ GPS' running app is free for a limited time

We have to respect Nike for somehow maintaining a presence with this kind of running app. After all, it has nothing to do with their shoes any more. When the Nike+iPod first debuted, it required special shoes, and an exclusive Nike sensor to operate. At this point, the Nike name is just branding.
Similar to other running apps, you can store workouts, track your progress, receive voice feedback mid-run, and check your position via the map. You can also connect with your friends to give support, or challenge your friends to a virtual race via Nike+ Tag. 'Nike+ GPS' is compatible with the iPhone 3GS, iPhone 4, and the 2nd, 3rd, and 4th-generation iPod Touch devices. But you obviously need both GPS and a wireless connection to fully utilize the app.