Eventbrite - Discover Great Events or Create Your Own & Sell Tickets

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

pretix - pretix helps you to sell tickets for your event in an easy way. It supports multi-lingual events and provides a wide range of features

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

Ticket Tribe - Sell tickets online with no fees per ticket

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