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

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

DownToMeet - DownToMeet is a platform to organize, find, and attend group events.

Cvent - Cvent's event management software provides event planners with a complete solution to increase event attendance and decrease event costs.

CooMeet - CooMeet is one of the best and leading next generation of video dating web-based application specially designed for those users who want to talk online to people they have never met.

EventMobi - EventMobi is an interactive mobile event app, audience response and engagement platform for conferences and trade shows.