The Motorola Droid is the first Android device to offer Google Maps Navigation, which brings free voice-guided navigation to your phone. For in-car use, consider investing in the Car Mount for the Droid. The mount includes a cradle to hold the device and an adjustable arm that attaches to your windshield or dash. In addition, once docked into the cradle, the Droid will display a navigation menu that allows you to plan a trip, view maps and directions, and search businesses. The Car Mount for Droid costs $30.