SmartHUD is an Android app paired with a small cradle device that is mounted to the inside of your car windshield. The system delivers important information to the driver like navigation instructions and text messages in a non-distracting manner. The system is hands-free and works with voice commands. You can tell SmartHUD to navigate somewhere, respond to text messages, and control music with your voice and you never have to take your eyes off the road. I am one of the co-founders and Android app author.
Checkout me presenting a live demo of the SmartHUD system at Drinks on Tap Mobile Meetup in Boston (Sep 21, 2013)