Slashdot.org - News for Nerds.  Stuff that matters.
HackaDay.com - Serves up a fresh hack each day, every day.
HotDealsClub.com - Collection of websites built by deal seekers.
CraigsList.org - Huge classified ads site.
HardOCP.com - Computer hardware news from the gamers perspective.

ShoutCast.com - Online radio stations, 10,366 and counting.
Knoppix.com - Bootable Linux system on CD or DVD.
SS64.com - A guide to Oracle, Windows, Linux and OS X commands.
Freesco.org - Versitile floppy based linux firewall.
SourceForge.net - World's largest Open Source software development web site.