Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Odoo - An all-integrated business app suite to unleash your growth potential.
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
Naologic - Speed up collaboration and work more securely with your partners, customers, and vendors by creating custom apps without a development team.
Ticket Tribe - Sell tickets online with no fees per ticket