Fuse - Fuse is a UX tool suite for mobile app designers and developers.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
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!
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