IsHostedBy.com - IsHostedBy is a website where you can lookup where certain websites are hosted.
SimilarWeb - SimilarWeb.com is a website analysis tool that gives you analytics information for any website.
CubDomain - CubDomain.com is the site to check website's statistics, Information, Whois Record, Hosting...
Site Rank Data - View historical rank information of websites via time series charts.
DomainTools - Domain name research, including comprehensive Whois Lookup, Reverse Whois Lookup and Whois History.
Quantcast - Quantcast Corporation is a digital marketing company that provides free audience demographics measurement and delivers real-time advertising.