Satellite Eyes is a simple Mac app that automatically changes your desktop wallpaper to the satellite view of where you are, right now.
The app sits quietly in the menubar at the top of your screen. Pull your laptop out somewhere new, and your desktop will automatically change to the view from overhead.
It features a number of different map styles, ranging from aerial photography to abstract watercolors. And if you have multiple monitors, it will take advantage of the full width, spanning images across them.
Oh, and the source code is available on Github.
Updated on Nov 23 2020
Note: Now requires OS X 10.12 or later