Babel Fish - a free machine translator for Spanish, German, Chinese, etc.
Wikipedia - a free encyclopedia
the Internet Movie Database - IMDB has everything you ever wanted to know about your favorite movies
MobyGames.com - like IMDB but for video games
SourceForge.net - over 100,000 open source projects: free software for eveything!
Map Quest - free maps and directions
eBay - if you can't buy it on eBay, it probly doesn't exist...
Project Gutenberg - 1,000's of free online books
Open Directory Project - a large collection of other cool places to visit on the net
DistroWatch.com - here's a good place to download any version of Linux(I'd recommend Debain).
AstaLaVista - all kinds of useful info for computer security and whatnot
How to put together a less expensive Recording Studio that Rivals Professional Studio Sound - if the first one doesn't answer yer question, maybe this one will
Traveling Travis - have you ever met someone briefly, yet felt as if you'd known them for years???
Amateur Microscopy by Daniel J. Geduld - some amazing pictures from a perspective that few get to see
IndyMedia.org - a place for activists to share news
ReclaimDemocracy.org - some folks trying to educate people about the abuse of corporations
CorpWatch.org - more folks keeping an eye on corporate abuses