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
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
GoodBarber - GoodBarber is a mobile app creation platform.
Ticket Tribe - Sell tickets online with no fees per ticket
BuildFire - BuildFire is the easiest way for small businesses to build a mobile app in a matter of minutes for iOS and Android.