Really Good Emails - A large collection of good product email design.
SendOut - Affordable email marketing for bloggers and influencers
Email Kick - Email designer and analytics for your transactional emails.
Mailblast - Email marketing on a budget using Amazon SES
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.