Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Seatswap - Swap your seat on the fly.
Cvent - Cvent's event management software provides event planners with a complete solution to increase event attendance and decrease event costs.
Shapr - A completely free way to build your professional network.
Ticket Tailor - Ticket Tailor is an easy-to-use event ticketing platform that allows event organizers of all shapes and sizes to sell tickets online.
Wildcard - Discover, connect and meet people at communities