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.

Event Hunt - Startups and Tech Events Curated By Locals

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

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