What could be better than google earth you ask? How bout being able to track real time weather, fires, floods, sandstorms all across the globe by the click of the mouse! Also maps of Saturn, the Moon, EVEN A DEEP SPACE VIEWER!
Point to Note: The code requires DirectX to compile. Also, this program is two years old. I used to use it, but it was a massive download (though it is far smaller now), and a lot of the extra features go unused. Google Earth displaced this almost immediately because it was so much smaller and had a bigger range of maps.