Computing and Technology

MoinMoinWiki: Software for creating your own wiki site. You can also create a wiki on your desktop using MoinMoin Desktop edition and MoinX (mac)
Engadget.com: all the latest and maybe greatest in technology. Daily blogs regarding news in the IT realm.
Hackaday.com: daily updates on DIY hacking projects
Instructables:Lots and lots of DIY projects with everything from building your own compost bin, to catapults to DIY touchscreens.
slashdot.org: the be all and end all of nerd news
xkcd.com: geek comic, updates on mon, wed, fri ..
drupal.org: the software that powers this website.