Q-Stats - Get free marketing insights for every question on Quora.
AdTargeting.io - AdTargeting - #1 Free Facebook Interest targeting tool. It enables you to discover hidden or niche interests, and max the ROI of Facebook ad targeting, with millions of daily updates on keyword search and trend database.
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Ubersuggest - Want more traffic? Ubersuggest shows you how to win the game of SEO. Just type in a domain or a keyword to get started.