Guestboard - Lead powerfully-organized group events with Guestboard – a modular event platform that gives groups of 10-1000+ people a central space to coordinate, build excitement, and save money. No more crazy email threads. No more massive group texts.

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

Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.

Kajabi - Kajabi is the only Knowledge Commerce platform today with everything you need to market, sell, and deliver your knowledge online.

Mobilizon - A free and federated tool to get our events off Facebook

WildApricot - WildApricot is a powerful cloud software to help you automate and simplify membership tasks.