1)   Stop-the-Pop-Up 2.54
Kill browser, Messenger Service, GAIN and SaveNow pop-ups automatically. The popup stopper has full support for both pop-ups and pop-under ads and will kill them even before they appear on the screen.

 2)   Sureshot PopUp Killer 3.10
Kill browser, Messenger Service, GAIN and SaveNow pop-ups automatically. The popup stopper has full support for both pop-ups and pop-under ads and will kill them even before they appear on the screen.

 3)   Stop-the-Pop-Up Lite 2.56
Kill browser, Messenger Service, GAIN and SaveNow pop-ups automatically. The popup stopper has full support for both pop-ups and pop-under ads and will kill them even before they appear on the screen.

 4)   Pop Up Blocker and Ad Killer for Kazaa 1.04
Pop Up Blocker and Ad Killer is designed to automatically detect and stop the pop up windows that are opened by popular file sharing programs such as Kazaa, Kazaa Lite, Morpheus, Grokster, XoloX, iMesh and Direct Connect.