Bringing to the Android Market what I consider one of the only useful augmented reality apps in existence, iOnRoad has introduced iOnRoad Augmented Driving. This app utilizes your Android device's rear camera to have a look at traffic in front of you, and, using complex visual algorithms, it determines headway, speed, direction, and potential traffic threats.
What's more, the app still keeps watching, and keeps you abreast of any potential dangers while running in the background, meaning you can switch to your music player, messaging app, or phone, and still get alerts from iOnRoad.
On top of its incredible safety features, the apps also offers social integration, allowing you to unlock (and compete for) driving achievements (which seem to be geared toward safe driving), and upload snapshots of interesting sights, reckless drivers, etc. to Facebook.
One last thing - you can set iOnRoad to automatically detect when you start driving, thereby starting the video feed and your augmented driving experience.
The app is now available for free from the Android Market after recently coming out of beta, so go ahead and give it a try!