Popup Stoppers
Links
Google Toolbar
The Google Toolbar is a very useful utility.
Pop-Up Stopper
One of the better popup stopping programs available.
Alexa Toolbar popular
http://download.alexa.com/?amzn_id=able2know04-20
alexa.com - The Alexa toolbar blocks popup ads. Read their privacy policy as their primary purpose is to aggregate web usage data to display how popular the sites you visit are.