Check the web pages before you visit them, with AVG LinkScanner
AVG LinkScanner is a free program that checks each web page in real-time before it opens on the browser. If it sees trouble ahead, it stops you.
It works fast; if your connection is also fast, you won’t have any delay problems using the LinkScanner.
AVG LinkScanner works in real-time; it doesn’t rely on “blacklists” of sites that have previously been poisoned, but instead checks for active threats right before you arrive at a page.
Note that the program is now included in AVG Free AntiVirus.