Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
WildApricot - WildApricot is a powerful cloud software to help you automate and simplify membership tasks.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
YourMembership - YourMembership provides membership management software integrated with social networking features.
Bylde - Bylde is a SaaS platform you can use to Start, Manage and Grow your groups and communities.
Kajabi - Kajabi is the only Knowledge Commerce platform today with everything you need to market, sell, and deliver your knowledge online.