Earth
TUAW pointed me towards OSXplanet, a Mac version of the UNIX xplanet program which renders pictures of the Earth, Mars and other planets, and allows you to put markers on them if you know the appropriate co-ordinates.
OSXplanet renders out a background image for you at a set interval, with a number of configuration options including whether or not you want to include live cloud data, earthquakes and satellite positions. You can even put markers in your favourite cities. And since it’s xplanet, it draws really nice maps complete with the current position of the sun lighting the planet.
If you’re a Mac user, it’s worth a look.
