unlayer / react-email-editor

Drag-n-Drop Email Editor Component for React.js

Notifuse / notifuse

Open-source, self-hosted newsletter, email marketing and transactional email platform. Visual MJML editor, Liquid templating, 7 sending providers.

voidlabs / mosaico

Mosaico - Responsive Email Template Editor

Mindbaz / awesome-opensource-email

Awesome Opensource Email Resources

milkshakesoftware / PreMailer.Net

C# library that moves your stylesheets to inline style attributes, for maximum compatibility with E-mail clients.

KumoCorp / kumomta

The first Open-Source high-performance MTA developed from the ground-up for high-volume email sending environments.

templatical / sdk

Drag-and-drop email editor. JSON templates, MJML rendering, framework-agnostic. Vue + TipTap inside. Source-available under FSL-1.1-MIT — free commercially, MIT after 2 years.

rustmailer / rustmailer

A self-hosted Email Middleware for IMAP, SMTP, Gmail API, Graph API — built for developers