Really Good Emails - A large collection of good product email design.
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!
Good Email Copy - Email copy from great companies.
Campaign Genius - Send dynamic email content through any platform, instantly.
Good Sales Emails - Best sales emails from great companies
MailChimp Snap - Send simple, photo-based email campaigns from your phone.