MJML - The open source framework for responsive emails
Campaign Genius - Send dynamic email content through any platform, instantly.
Growthmysales - Increase e-commerce sales, grow email lists, and engage visitors effortlessly with our 5-minute simple popup builder.
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!
Email Design System for Sketch - Sketch file with 10 email templates for designers
MailChimp Snap - Send simple, photo-based email campaigns from your phone.