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

Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.

Groups.io - Email and web based discussion group software, includes archiving, emails, wiki, polls, file...

Mailman - Mailman is free software for managing electronic mail discussion and e-newsletter lists.

Mighty Networks - Mighty Networks enables entrepreneurs, organizations, and companies to create and grow a community-powered brand.

LISTSERV - LISTSERV is a communications server software that professionally manages the message traffic for email, blogs, and more.