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.
B3App - B3App is an event organizing and management platform that helps people throw, run and manage events.
Mobilizon - A free and federated tool to get our events off Facebook
Digitevent - The powerful software to manage your event participants.
Get Together - Get Together is an open source event manager for local communities.
ConventionSuite - ConventionSuite is an enterprise-level event and exhibition management software that is specially developed to streamline, structure, and maximize the entire event planning process.