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

RetailMenot - The RetailMeNot mobile app allows you to find deals on the go for both online shopping and in store shopping.

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

Slickdeals.net - Slickdeals: The Best Deals, Coupons & Discounts on everything

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

Honey - Honey is a browser extension that automatically finds and applies coupon codes at checkout with a single click.