GroupSpaces

Free Group Website, Membership Database, Listserv Mailing List, Online Group Management Software : GroupSpaces

Attendize Event Ticketing

Attendize is a free & open-source ticket selling and event management platform

Confetti is the all-in-one tool for all your conferences, festivals, workshops and social events.

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

Far or Near™ is a privacy-oriented social network that helps you connect with others who share your…

Mailman is free software for managing electronic mail discussion and e-newsletter lists.

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

Used by thousands of sports groups around the globe, OpenSports is the gold standard for managing events, attendees, and payments.