Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform
TechEvents.co - Tech and startup events aggregator
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
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Ticket19 - Sell tickets for your events with minimal transaction fees.
Facebook Local - Discover places to go and events happening near you