GNU Mailman is a mailing list management software. Mailman project was started long time ago before the Millennium. Since its birth it has become the most intelligent tool for handling mailing lists ever. Huge number of companies with Fortune 500 members among them have been using Mailman for years. The new version Mailman 3 brings to us even better user experience and communication power.
Mailman - Mailman is free software for managing electronic mail discussion and e-newsletter lists.
BizRun - Manage HR and grow your business visually.
Sympa - Sympa is an open source (GNU GPL) mailing list management (MLM) software.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Worknice - Worknice is a performance management software that helps companies effectively manage their sales and customer-related business processes.
Listmonk - Send e-mail campaigns from a powerful dashboard. High performance and features packed into one app.