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Forumbee - Forumbee offers community forums for discussions, feedback and Q&A.

Tendenci - Tendenci - The Open Source AMS is a cloud-based​ all-in-one management SaaS solution for Non-profits and Associations.

Discourse - Discourse is an open source discussion platform built for the next decade of the Internet.

YourMembership - YourMembership provides membership management software integrated with social networking features.