Mailman - Mailman is free software for managing electronic mail discussion and e-newsletter lists.
SendPulse - Maximizing e-mail marketing open rates automatically
Gmane - Gmane (pronounced like "mane") allows users to access and participate in e-mail-based...
mlmmj - Mlmmj is a simple and slim mailing list manager (MLM) inspired by ezmlm.
MailerLite - Affordable Email Marketing Software. Get all features (Segmentation, Automation, A/B testing) for up to 1,000 subscribers & send unlimited emails for free!
MailChimp - MailChimp is the best way to design, send, and share email newsletters.