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 Sales Emails - Best sales emails from great companies
Campaign Genius - Send dynamic email content through any platform, instantly.
Great Email Copy - A dose of emails from around the web.
MailChimp Snap - Send simple, photo-based email campaigns from your phone.