Lethal Gimmick

FileHippo.com (if you use windows this site is great for all sorts of useful applications.)
http://www.filehippo.com

DimDim (Free Web Conferencing)
http://www.dimdim.com/

Drupal (Best Free Content Management System (CMS aka this website layout))
http://www.drupal.com
whitehouse.gov just switched over to using drupal as their new website...

URL Shortener:
http://ow.ly/url/shorten-url

Go To Assist (Cost $ but worth every penny in the IT world)
http://www.gotoassist.com

Log Me In (Remote Control program)
http://www.logmein.com/