GMass - GMass allows you to easily schedule emails, send out mass emails and mail merge campaigns and more with Gmail! Click here to learn about more features!
Design Principles - An open source repository of design principles and methods
Campaign Genius - Send dynamic email content through any platform, instantly.
Product Disrupt - A design student's list of resources to learn Product Design
MailChimp Snap - Send simple, photo-based email campaigns from your phone.
Colorbox.io - Create accessible color systems 🎨