SiteAdvisor

SiteAdvisor is a security plug-in for your web browser that helps you identify sites that link to malicious software such as spyware, adware, spam, viruses, fake sites, phishing, or online fraud. The program integrates a search tool, which then shows you the status of the site using an icon to indicate whether or not it is safe. If a page looks unsafe, you can view detailed information about its content, including spam sent from it, dangerous files, etc.