WildApricot - WildApricot is a powerful cloud software to help you automate and simplify membership tasks.
Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.
Kajabi - Kajabi is the only Knowledge Commerce platform today with everything you need to market, sell, and deliver your knowledge online.
Membee - Membee is web-based membership management software.
Tendenci - Tendenci - The Open Source AMS is a cloud-based all-in-one management SaaS solution for Non-profits and Associations.
Galette - Galette is a membership management web application towards non profit organizations.