Kommunity - Explore communities that share your passion with millions of people
Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.
Facebook Groups - This app gives you a dedicated space for you and your groups
Mighty Networks - Mighty Networks enables entrepreneurs, organizations, and companies to create and grow a community-powered brand.
MemberSpace - MemberSpace lets users create online course, training program, or other business idea inside existing Squarespace website.
TidyHQ - Organization management tool to support membership, subscriptions, event planning, and outreach.