Web of Trust (WOT) is a free community-powered website reputation service that tells you which websites you can trust based on other users’ experiences.
WOT works in a very simple way. It shows website reputations as traffic lights next to search results when using any popular search engine.
They are also visible next to links in social networking and other popular sites.
By clicking the traffic light icons that WOT displays you can find out more information about a websites reputation and other users’ opinions.