HypeStat - HypeStat is free statistics and analytics service, where you can find information about every website.
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.
Q-Stats - Get free marketing insights for every question on Quora.
Bullmask - Bullmask is a popular torrent search engine. It provides free Movies, Ebooks, Softwares and more. They offer free website stat tool with Bullmask Analyze.
cutestat - Website Stats and Valuation. CuteStat.