Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
TicketPeak - Online Ticketing Software
Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform
Audience View - Audience View is a cloud-based ticketing solution created for the performance arts industry and suitable for both profit and commercial uses.
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
TicketingHub - Next generation of Ticketing