Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform
TechEvents.co - Tech and startup events aggregator
Yapp - Yapp enables users to create personalized mobile applications for their events, gatherings, and groups.
Facebook Local - Discover places to go and events happening near you
Iventlist - Create an app for your event in minutes 🎟️
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets