http://earth.google.com/sky/skyedu.html

The first several versions of Google Earth let users explore the Earth, and it is not surprising that with this latest version users can go into outer space as well. Essentially, the "Sky" function within this version allows visitors to look around at a hundred million stars and two hundred million galaxies. Additionally, this application contains images from the Hubble telescope. This version is compatible with computers running Windows 2000 and XP. [KMG]

http://quicksilver.blacktree.com/

Looking for files and applications can be a bit of a bother, to say nothing of time-consuming over the long run. Quicksilver 1.0b51 is a keyboard-shortcut launcher that benefits from having a visually pleasant interface and a number of customization options that are quite unique. It lets users create a task viewer, a "shelf" for storing frequently accessed files, and a clipboard history. This particular version is compatible with computers running Mac OS X 10.3. [KMG]