Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform
Ticketmaster - At Ticketmaster, we strive to put fans first. Every day we're listening to your feedback and working to improve your experience before, during, and after events.
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
Eventzilla - Eventzilla lets you sell tickets online and manage attendees from one integrated application.
Ticket19 - Sell tickets for your events with minimal transaction fees.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets