Email Kick - Email designer and analytics for your transactional emails.
Flexmail Solution - Professional email marketing with powerful and easy-to-use features
Really Good Emails - A large collection of good product email design.
Mizmoz - Easy-to-use, state of the art, email service provider dedicated to support growing businesses.
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.
Marble Responsive Email Designer - Marble helps you design beautiful and mobile-friendly emails and newsletters.