BeeFree - BeeFree is an all-in-one solution that works anywhere you are.
Awesome Mails - Awesome Mails creates beautiful image map emails, featuring an easy to use drag-and-drop editor...
Mail Designer 365 - Discover Mail Designer 365, the easiest way to design mobile-optimized HTML emails, templates and newsletter designs. Your HTML email designer for Mac.
Flexmail Solution - Professional email marketing with powerful and easy-to-use features
MJML - The open source framework for responsive emails
Kingmailer - Kingmailer helps you send, receive and route/forward emails.