1. GPGMail is an open source plugin for Apple Mail.

  2. OnionMail the TOR encrypted Mail Server

  3. SOGo is groupware server with a focus on scalability and open standards.

  4. Gaggle Mail is a simple and easy to use email list manager.

  5. Fully managed pub/sub messaging for microservices, distributed systems, and serverless applications

  6. A Kanban board for your emails.

    paid Free Trial $8.0 / Monthly

  7. Secure premium email service with mobile sync apps for calendar, contacts, tasks, notes and FISMA compliant email archiving.

  8. Security extension to Mozilla Thunderbird and SeaMonkey

  9. Show you are in business and look professional with custom email at your company domain.

  10. Gmail Meter is a monthly analytic report of your email habits and practices, sent directly to your...

  11. Pageclip is a simple way to save information from the website via forms or front-end JavaScript.

  12. Secure form submission capturing for all your static sites.