Listmonk - Send e-mail campaigns from a powerful dashboard. High performance and features packed into one app.
Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.
Sendy - Sendy is a self hosted newsletter app that sends emails 100x cheaper via Amazon SES
TidyHQ - Organization management tool to support membership, subscriptions, event planning, and outreach.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Mighty Networks - Mighty Networks enables entrepreneurs, organizations, and companies to create and grow a community-powered brand.