TechEvents.co - Tech and startup events aggregator
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
Cvent - Cvent's event management software provides event planners with a complete solution to increase event attendance and decrease event costs.
Leade.rs - Leaders matches event organizers with speakers in tech.
EventMobi - EventMobi is an interactive mobile event app, audience response and engagement platform for conferences and trade shows.