Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Alkarta - Find happenings in 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
Soon - Never miss something awesome
Ticket Tribe - Sell tickets online with no fees per ticket
Party with a Local - Party with a Local is a free app that connects travelers with locals that want to party.