Below are external links of interest for Desktop Sun Tracker

Technical

• earthobservatory.nasa.gov was the source of the background images (or more specifically, earthobservatory.nasa.gov/Newsroom/BlueMarble).
• GRID-Arendal was the source of coordinate data.
• NOAA sunset / sunrise calculation algorithms.

Similar Programs

• NASA's jtrack, a java satellite tracking applet which will run in an active desktop session
• XEarth is a similar program (ported to windows, originally from UNIX). You might also want to take a look at XPlanet

Other sites of interest

• DMOZ or Google's version
• Freebie Land

The Author

• Home page