Design Principles - An open source repository of design principles and methods
Newsletter Operating System - All-in-one dashboard to launch & grow your newsletter
Facebook Design Resources - A collection of free resources made by designers at Facebook
Sponsor This Newsletter - 100+ newsletters ready to promote your product
Facebook - Connect with friends, family and other people you know. Share photos and videos, send messages and get updates.
Newsletter Bootcamp - Learn how to start and grow your newsletter in seven days