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

Attendify - Develop relationships at the events that you attend by creating smaller events with just a few people.

Zoho Backstage - Plan, run, and analyze your event— all from one place

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

Meetup for iOS and Android - Discover groups that are all about the things you love

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