Really Good Emails - A large collection of good product email design.
MailGet - Super affordable Email marketing via Amazon SES
Email Kick - Email designer and analytics for your transactional emails.
Mailzak - Give a boost to your #EmailMarketing
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.
rasa.io - Get more from your email list.