WOT, Web of Trust, lets Internet users share their knowledge of websites, helping you stay in control when you surf the Web. Besides its users, WOT uses hundreds of trusted sources such as phishing site listings to keep you protected against rapidly spreading online threats.
As you search with Google, you will see a tiny icon next to the Web link: green to go, yellow to slow down, red to stop. WOT has information on 21 million websites, and the reputation database is updated every 30 minutes. WOT ratings are shown also on Yahoo!, Gmail, Wikipedia, Digg, del.icio.us, AOL, and MSN. No registration is required.