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BigSpeed Popup Blocker : Popup blocking component
ActiveX control for intelligent popup blocking. The component monitors all running browser instances (Internet Explorer 5 and up) and quietly eliminates all unwanted pop-ups and pop-unders ads before they appear.
www.bigspeed.net/

Ad Zapper Popup Blocker
User friendly Popup Killer. Easily configured to allow popups from specific sites.
www.adzapper.net/

PassSafe - Password Protector, Popup Blocker, Google Search Tool
PassSafe Pro is a password protector that now also blocks pop-ups and many other types of annoying advertising. The latest version of PassSafe even lets you search Google by typing search terms directly in the address bar.
passsafe.com/

Popup Killer and Ad Blocker Software Archive
Software designed to stop unwanted popup window ads and improve your surfing experience without annoying pop up ads.
www.popupkillersoftware.com/

QuikShield Popup Blocker by Goggle Software
Software protects privacy in three ways blocking popup windows, hiding Web, AOL, and Chat windows, and clearing Internet history and cookies. Product specifications, screenshots, FAQs, and downloads.
www.quikshield.com/

CuteShield IE Popup Blocker
Blocks the creation of unwanted ad windows. [Windows 98/ME/NT4/2000/XP]
www.sys-shield.com/