globes comparison
People ask me about the differences between the various globes software. A good place to start is EarthSLOT's comparison of 3D engines--a page that discusses some of the strengths and weaknesses of Skyline, Google Earth, GeoFusion, and NASA World Wind.
http://www.earthslot.org/earthslot_3Dengines.php
http://www.earthslot.org/earthslot_3Dengines.php