SaaS Email Templates - Responsive HTML email templates for SaaS startups
Templates by Email Monster - Hundreds of free, responsive email templates. Pick and edit.
Email Template Generator - Email templates for your important relationships
HTMLEmail.io - Responsive HTML email templates for startups & developers
Transactional Email Templates by Postmark - Open source email templates for use in your SaaS app.
Startup Emails - Responsive HTML email templates for startups