Advanced Google Adwords - An in-depth look at using AdWords effectively

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.

AdNabu - AdNabu is a Google Ads PPC automation software.

InterestExplorer - Discover 1000's of hidden Facebook interests to target.

Opteo - Opteo searches for statistically significant patterns in an account and creates "optimization tasks" to improve account performance.

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.