SimilarWeb - SimilarWeb.com is a website analysis tool that gives you analytics information for any website.
Site Rank Data - View historical rank information of websites via time series charts.
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.
Q-Stats - Get free marketing insights for every question on Quora.
SimilarStores - SimilarStores is a free tool that helps you to find similar stores to any store!
Seoxan - check seo report for any website, alexa ranking, server information, meta tags, authority, page speed and more