Android Market Pick: CoPilot Live
Although Google has added navigation to their Google Maps service on Android 2.1 and newer builds, one of the downsides of the navigator is that you need to have a data connection active to use it. CoPilot Live is a navigation program that is capable of downloading customized maps of many regions of the world to the storage card. There are millions of points-of-interest and other features to help you get to where you need to go. The full version of CoPilot Live is $29.99 on the Android Market.