LinkedIn Events - A new way of connecting people from LinkedIn
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Soulpicks - Discover places loved by friends and experts
Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform
Calendify - Calendify is an event community where you can share, publish, and subscribe to event calendars. It helps you to stay informed about what you are interested in and what is yet to come.
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