The Startup Way - The new book from Eric Ries, author of The Lean Startup
MyAdLibrary - MyAdLibrary is the marketing tool that provides you the features to monitor and spy the results of the Facebook ads.
UI Playbook - The documented collection of UI components
Pudding.ai - Real-time ad creative analysis solution that helps marketers to easily understand ad creative performance with actionable insights.
50 UI Tips - Improve your UI/UX skills in an hour, for free
AdPlexity - AdPlexity is a popular and highly effective competitive intelligence service in the world and is a perfect fit for individuals looking up to their ad campaigns and crush the competition.