Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Galette - Galette is a membership management web application towards non profit organizations.
Brevo - Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.
Bigtent - BigTent is a web-based organization and communication portal for groups.
Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.