Templates by Email Monster - Hundreds of free, responsive email templates. Pick and edit.
Easy User Test - Easy User Test is a user testing tool that offers the easiest way to test your text and design.
SaaS Email Templates - Responsive HTML email templates for SaaS startups
Useberry - User testing feedback and rich analytics in minutes
Email Template Generator - Email templates for your important relationships
Peek by UserTesting - Get a free, 5-minute video of someone using your site