1)   StopCop Popup Software 2.03b
Automatically kill annoying pop up windows. StopCop will stop all possible types of popups, including windows spam messages, browser popup windows and pop-under windows, and even in-line browser advertising popups.

 2)   eZanga Toolbar & Free Popup Blocker 2.0
The Free eZanga.com Toolbar serves as both a way to get relevant information right from your browser as well as a Popup Blocker to stop those annoying ads. The Toolbar includes informational tools such as Web results from the leading search engines.

 3)   CleanMyPC Free PopUp Blocker 2.09
Stop PopUp with CleanMyPC™ Free PopUp Blocker! Completely FREE! The built in "Artificial Intelligence" engine will automatically distinguish between popup ads and useful popup window. No Cost! No Configuration! No Popup!

 4)   POP-Stopper-IE 1.2.6
Best Popup Remover. Best popup blocking technology. Allows the use of CTRL-N, SHIFT-Click, and even Right-Click New Window. Allows multiple IE windows. Fully automated version updates. Stops websites from resizing your Internet Explorer.