Site Rank Data - View historical rank information of websites via time series charts.

Optmyzr - Optmyzr AdWords Tools. Optimization Solutions, Quality Score Tracker, Landing Page Checker, and more. Free Trial Available.

Q-Stats - Get free marketing insights for every question on Quora.

Pathmatics - Pathmatics provides actionable display and mobile intelligence to many brands, agencies, publishers, and advertisers.

HypeStat - HypeStat is free statistics and analytics service, where you can find information about every website.

Freshmarketer - An all-in-one CRO suite.