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.

Eventbrite - Discover Great Events or Create Your Own & Sell Tickets

Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform

Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.

Ticket Tribe - Sell tickets online with no fees per ticket

Eventjoy - The Easiest Way To Organize An Event