Map live wallpaper for your Android phone. You do not need to launch map application to see where you are in the city / in the world. Your location is always on your home screen.
Map Live Wallpaper control widget. You can zoom in/zoom out change map style directly from home screen.

You can select preferable map zoom level and beautiful style:

MapBox (Tiles © Mapbox © OpenStreetMap):
Streets
Streets classic
Terrain
Satellite
Satellite Streets
Satellite Afternoon
Space Station
Wheatpaste
Light
Dark
Comic
Outdoors
Run Bike and Hike
Pencil
Pirates
Emerald
High Contrast
Bright
Moonlight
Standard
North Star
Whaam!
... and much more beautiful styles

Stamen maps (Map tiles by Stamen Design under CC BY 3.0. Data by OpenStreetMap under CC BY SA.):
Toner
Watercolor

Thunderforest (www.thunderforest.com www.openstreetmap.org/copyright):
OpenCycleMap
Transport
Transport Dark
Landscape
Outdoors
Spinal Map
Pioneer
Mobile Atlas
Neighbourhood