Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Bizness Apps - Create your own app or become a reseller and build apps for others
Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform
Siberian CMS - Siberian is an Open-Source and Free App Maker. Unlimited Push Notifications. Unlimited features. Fully Customizable. Download it and build your own app now!
Ticket Tribe - Sell tickets online with no fees per ticket
Dropsource - Mobile development platform for building native iOS & Android apps