Similar to the black boxes used in aircraft to record their flight data, the iCar application for the iPhone allows you to transform your smartphone into an accident recording device for your car.
Once enabled will record any accidents you might to involved in, be it your fault or another, and features an analog and digital speedometer via GPS and G-sensor oscilloscope.
In the event of an accident, the application automatically senses and saves the accident point via GPS and links it to Google maps and can then email that data if required.
The app is currently available to download for free for a limited time from the iTunes App Store.
Via Slashgear