FOLDOC - a free On-Line Dictionary of Computing
Merriam-Webster - when you need a Dictionary or Thesaurus
The StartSpot Network - will simplify your search for the best of the Web.
Medicine Plus - a medical encyclopedia, drug information, directories to doctors, dentists, hospitals, and much more
Brainboost - find answers to your questions
Fascinating Sites
Molecular Expressions - see Unseen Worlds Through the Microscope and Telescope
How Stuff Works - to learn how anything works
World Clock, Etc. - view fascinating statistics
Google Earth (and Sky) Free - download here