Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
GoPad for Schools - School Management
Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform
Picatic - Picatic encourages event organizers to create a custom website, sell tickets and then determined their cost of use. Selling out events is easy with Picatic.
EventCreate - 100%-free event ticketing
Tuio - Tuio is a billing and payment application that allow daycare centers and pre-schools to centralize and manage all parent billing and payment in one place.