TicketSource - Free, easy to use online ticketing for your events.
Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform
Ubicentrex - French call center software
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Ticket2u - Malaysia no.1 online ticketing solutions
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