cutestat - Website Stats and Valuation. CuteStat.
Site Rank Data - View historical rank information of websites via time series charts.
WebsiteOutlook - WebsiteOutlook is an all-in-one website that provides you detailed information on famous websites based on various data sources like traffic, page rank, and estimated ad revenue.
Q-Stats - Get free marketing insights for every question on Quora.
Rankchart - Rankchart is one of the unique websites that allows you to examine your websites or watch competitors and locate rich information about website technologies, site reputation, errors, SEO, and ad-word recommendations.
HypeStat - HypeStat is free statistics and analytics service, where you can find information about every website.