"The basic idea behind open source is very simple. When programmers on
the Internet can read, redistribute, and modify the source for a piece
of software, it evolves. People improve it, people adapt it, people
fix bugs. And this can happen at a speed that, if one is used to the
slow pace of conventional software development, seems astonishing...
...The Open Source pages exist to make this case to the commercial world." - Introduction to Open Source - www.opensource.org
* xearth
xearth displays an image of the earth, as seen from your favorite vantage point in space (this can be your current position), correctly shaded for the current position of the sun. By default, xearth updates the displayed image every five minutes. The time between updates as well as many parameters can be changed using the settings.
This is a completely rewritten port of xearth V.1.1 for UNIX. See also: http://hewgill.com/xearth/original/