Swarm - Swarm lets you earn prizes and compete with friends based on the places you go.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Arc App - AI powered location tracker
Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform
Foursquare - Foursquare is all about helping you find new ways to explore your city.
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