Awesome Mails - Awesome Mails creates beautiful image map emails, featuring an easy to use drag-and-drop editor...

Mailivery - Reach the Inbox, not the spam folder.

Mizmoz - Easy-to-use, state of the art, email service provider dedicated to support growing businesses.

Sidemail - The simplest way to send transactional emails. Sidemail makes sending transactional emails trivial, it's perfect for side projects, MVPs or the next big thing.

Marble Responsive Email Designer - Marble helps you design beautiful and mobile-friendly emails and newsletters.

Postal - Open source mail delivery platform, alternative to Mailgun or Sendgrid