Templates by Email Monster - Hundreds of free, responsive email templates. Pick and edit.
HTMLEmail.io - Responsive HTML email templates for startups & developers
Transactional Email Templates by Postmark - Open source email templates for use in your SaaS app.
Pistachio Email Templates - Delicious newsletter templates built for automation
Stripo - Stripo is an all-in-one email design platform. We enable our clients to build emails of any complexity, including interactive AMP emails, really fast and easy.
Gmail Email Templates by cloudHQ - Copy a successful company's email template in 1 Click