Mutt - Mutt is a small but very powerful text-based mail client for Unix operating systems.
aerc - Highly efficient and extensible email client for the terminal
Alpine - Alpine is a fast, easy to use email client that is suitable for both the inexperienced email user...
Netlify - Build, deploy and host your static site or app with a drag and drop interface and automatic delpoys from GitHub or Bitbucket
Mailspring - Mailspring is a mail client for Mac, Windows and Linux.
Coolify - An open-source, hassle-free, self-hostable Heroku & Netlify alternative.