Mister Popper Stopper
This popup stopper software monitors all open IE windows for popups. Unique "Setup Mode" notifies you whenever a site tries to send a popup, and lets you block it or allow it with the click of a button. Once you turn off Setup Mode, only popups from sites you have specifically allowed will be... Unique "Setup Mode" notifies you when a site tries to open a popup and lets you choose whether to allow or permanently block popups from that site. ... Can sense when your mouse is over a link and allow popups that are the results of clicking a link that opens in a new window.
http://www.rebrandsoftware.com/demodownload.asp?id=16 - 3Mb - Download - Screenshot

EndTask Free
The Free edition of the EndTask family is a unique pop-up blocker. Not long after you start browsing the internet, the term "pop-up" defines itself. You? re at a website and another window pops up out of nowhere. Pop-ups are usually annoying advertisements that waste a lot of your time while... Pop-up blockers normally block all or nothing. ... When you finally get to your favorite site, there's a good chance it will use a pop-up window to present information to you. ... A sound plays and a small notification window appears that gives information about the pop-up.
http://www.endtaskpro.com/download/EndTaskFree.exe - 1Mb - Download - Screenshot

IdentaPop
A unique Caller ID popup display that overlays the Caller ID on your screen and slowly fades away. Fully integrated with MS Outlook Contacts including Exchange Server public folders for lookups and screen pops for IP phones (Asterisk, Avaya, Cisco, ESI, NBX, NEC, Nortel, Panasonic etc) and TAPI... This is a perfect solution for someone who does not want another window popping up that covers their work. ... Call blocking is included and if using TAPI mode, IdentaPop can play an outgoing wave file before hanging up.
http://www.identafone.com/software/identapop.zip - 3Mb - Download - Screenshot

TZ Personal Firewall
TZ personal firewall stops Hackers, Trojans, Spyware, Viruses, DoS attacks & data thieves & protects your PC from Internet-borne threats. Put a secure barrier between your hard drive & hackers, whether you use a dial -up, ISDN, DSL or cable connection. ... If an unknown outside source attempts a connection to your computer, a pop-up window alerts you to the intrusion & again prompts you to choose whether to grant access. ... When other programs or processes attempt to access your Internet connection attempting to use your Internet connection to communicate with the outside world, a window...
http://www.trackzapper.com/download/tzpf33.exe - 3Mb - Download - Screenshot