Event Tickets allows your visitors to RSVP and buy tickets to events
Bridge plugin for adding Name Your Price support
Event Espresso 4 Core for WordPress: Build an Event Ticketing Website
Open Source Ticket Selling & Event Management Platform
Run your own Events business with Eventmie
Event tickets for SilverStripe and Event Calendar
Self-hosted multi-organization event management Laravel package
Create a dedicated platform for Event Planning with Laravel for Free