Kingmailer - Kingmailer helps you send, receive and route/forward emails.
Really Good Emails - A large collection of good product email design.
Flexmail Solution - Professional email marketing with powerful and easy-to-use features
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.
Dragon Responsive Email Designer - Dragon Email Designer provides an intuitive drag and drop newsletter design tool.
Email Love - Email design inspiration, templates and discovery