SimilarWeb - SimilarWeb.com is a website analysis tool that gives you analytics information for any website.
iLend - Keep track of the things you lend and borrow.
Site Rank Data - View historical rank information of websites via time series charts.
Crowddy - A crowdfunding platform for american students in debt
Quantcast - Quantcast Corporation is a digital marketing company that provides free audience demographics measurement and delivers real-time advertising.
Masterworks - Invest in the world’s most valuable paintings.