This app shows world map divided into day and night portions.
Digital clock can be put over the map, and most of the settings can be done on touch screen. So this app can make android tablets a table clock.
The map is also be a live wallpaper, the clock can also.
Is it night or day in Australia? — This app lets you view the darkness and daylight across the world and overly a digital clock on top of it. You can also use the view as live wallpaper. cool!