From WOT Services:
With Web of Trust for Internet Explorer, make your Internet Explorer more secure. Keep yourself safe from spyware, adware, spam, viruses, browser exploits, unreliable online shops, phishing, and other Internet scams. With WOT, you can easily see the reliability of companies and websites. WOT will warn you and save your computer before you interact with a harmful site. 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 30 million websites, and the reputation database is updated every 30 minutes. WOT ratings are shown also on Yahoo, Gmail, and Wikipedia.
What's new in this version:
Version 20111107 fixes potential issues with the settings page and clarifies warning texts.