[Android app] Waze (alpha)

"There are plenty of social, web, and technology tools to help you with your commute. Whether you have a TomTom or constantly whip out your iPhone, you can find driving directions, locations, general traffic information, and even speed traps. However, what Waze is aiming to do is far more ambitious.

Waze for Android uses crowdsourcing to create driver-generated maps, is expanding out of Israel and is launching today in the U.S. With it is a technology that gathers information on driving patterns, traffic, accidents, police traps, and more and analyzes it in order to inform the driver of the best possible route available."

source - Mashable