Alexa Toolbar with Free Pop Up Blocker
The Alexa Toolbar is totally free, and has a built in pop up blocker.
The Alexa Toolbar has many features in addition to a pop up blocker. You can find out who owns a site, and how to contact them. You can discover how popular a site is. You can also get a list of links related to a given site.
The toolbar has a built in search box, that searches the internet using Google's search engine. You can even write reviews for websites, giving your personal opinion for others to read.
To install and use the Alexa Toolbar, you must be running Windows, and be using Internet Explorer 5 or higher.
To download the Alexa Toolbar with free pop up blocker, visit this link: