attending.io - Tiny event pages to ask people one question – are you attending? Twitter login.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Ticket Tailor - Ticket Tailor is an easy to use event ticketing platform that puts you in control.
Ticket2u - Malaysia no.1 online ticketing solutions
EventNut - Build compelling branded event sites with payment processing
TicketSource - Free, easy to use online ticketing for your events.