yOzi is a navigation software for Android and iPhone platforms. It uses digital topographic maps in well-known Ozi Explorer formats for navigation and don't not requires network access like built-in Maps application on Android.
Topographic maps rendering Auto-switching between maps Switching between multiple maps for a given location Movement tracking using internal GPS receiver Worldwide search for places by name using Google's API (requires network access). You can search for a city, street, lake or river and view it's location on your topographic map. yOzi uses Swampex library - see http://code.google.com/p/swampex/ for more information.
If you want to participate in this project, or have any questions - please contact me: Daniil Smelov
NB: iPhone version has a separate homepage and can be found at http://dair.spb.ru/yozi/