BigSpeed Popup Blocker is an ActiveX control that allows you to create your own application 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. BigSpeed Popup Blocker does not require any configuration and will start killing popups right away. The key features are:

Exclude certain domains from the checking
Play sound alerts
Customize the sound alerts
Suppress JavaScipt unload event handlers
Block JavaScript dialog boxes
Enable popups by holding down the CTRL key
Blocking event with the url of the loaded page
Multi-threaded, fully self-contained ActiveX control