Site Rank Data - View historical rank information of websites via time series charts.
SimilarWeb - SimilarWeb.com is a website analysis tool that gives you analytics information for any website.
VALBOT.COM - VALBOT.COM provides domain name valuations.
Quantcast - Quantcast Corporation is a digital marketing company that provides free audience demographics measurement and delivers real-time advertising.
Q-Stats - Get free marketing insights for every question on Quora.
Forrester Research - Forrester works with business and technology leaders to develop customer-obsessed strategies that...