As on the Droid, Google Maps Navigation is now available for free for mobile devices running Android 1.6 and higher that includes T-Mobile’s G1 and myTouch 3G.
The app still needs work and it’s still in beta but it’s the first completely free GPS app with voice prompts. As on the Droid, Google Maps Navigation offers voice guidance, automatic reroutes, plus several standout features including 3D satellite views en route.
Old Android 1.5 devices like the HTC Hero, Samsung Behold II, …