MyAdLibrary - MyAdLibrary is the marketing tool that provides you the features to monitor and spy the results of the Facebook ads.
Design Principles - An open source repository of design principles and methods
AdWhistle - AdWhistle is a web-based platform that provides you the features and tools to create a campaign strategy and run the ads successfully on various social media platforms.
Atlassian Design - Design, develop, and deliver
Pudding.ai - Real-time ad creative analysis solution that helps marketers to easily understand ad creative performance with actionable insights.
Facebook Design Resources - A collection of free resources made by designers at Facebook