Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.
Marble Responsive Email Designer - Marble helps you design beautiful and mobile-friendly emails and newsletters.
Groups.io - Email and web based discussion group software, includes archiving, emails, wiki, polls, file...
Awesome Mails - Awesome Mails creates beautiful image map emails, featuring an easy to use drag-and-drop editor...
GroupSpaces - Free Group Website, Membership Database, Listserv Mailing List, Online Group Management Software : GroupSpaces
Flexmail Solution - Professional email marketing with powerful and easy-to-use features