Optmyzr - Optmyzr AdWords Tools. Optimization Solutions, Quality Score Tracker, Landing Page Checker, and more. Free Trial Available.
Site Rank Data - View historical rank information of websites via time series charts.
Freshmarketer - An all-in-one CRO suite.
SimilarWeb - SimilarWeb.com is a website analysis tool that gives you analytics information for any website.
Crazy Egg - Through Crazy Egg's heat map and scroll map reports you can get an understanding of how your visitors engage with your website so you can boost your conversion rates.
Quantcast - Quantcast Corporation is a digital marketing company that provides free audience demographics measurement and delivers real-time advertising.