Waze For Android, iOS
Waze is a free GPS app that taps the misfortune of some motorists to help steer others around traffic jams with hands-free voice commands and turn-by-turn navigation. By using input from other “Wazers,” cloud-based intelligence offers alternate routes to help avoid slow movement and alert drivers of road hazards, police activity and other traffic conditions.
Waze also provides ETA estimates based on upcoming road conditions, and pop-up notifications offer drivers the option to specify the cause of their particular slowdown. A recent update adds directions to gas stations, convenience stores, restaurants and other attractions. There's even a chat feature for fellow Wazers. Location data can be shared via text or email, and the app provides the option of checking into Foursquare.