Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
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.
Eventzilla - Eventzilla lets you sell tickets online and manage attendees from one integrated application.
Mobilizon - A free and federated tool to get our events off Facebook
Splash - Anyone can create a Splash event, whether you're a company hosting a single event or an individual hosting a personal event like a birthday or wedding. Get Started for Free. Text goes here. X. Full Event Program.
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.