Meetup
Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
20 Alternatives To Meetup
Attendize Event Ticketing
Attendize is a free & open-source ticket selling and event management platform
Collaborizm
Meet New People. Build Amazing Things. A workspace for aspiring Entrepreneurs, Engineers, and Creatives.
Confetti
Confetti is the all-in-one tool for all your conferences, festivals, workshops and social events.
Cvent
Cvent’s event management software provides event planners with a complete solution to increase event attendance and decrease event costs.
Eventbrite
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Eventzilla
Eventzilla lets you sell tickets online and manage attendees from one integrated application.
GroupSpaces
Free Group Website, Membership Database, Listserv Mailing List, Online Group Management Software : GroupSpaces
Mobilizon
A free and federated tool to get our events off Facebook
Picatic
Picatic encourages event organizers to create a custom website, sell tickets and then determined their cost of use. Selling out events is easy with Picatic.
Ticket Tailor
Ticket Tailor is an easy to use event ticketing platform that puts you in control.
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