Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform
Sli.do - Slido is the ultimate Q&A and polling platform for live and virtual meetings and events. It offers interactive Q&A, live polls and insights about your audience.
Zoho Backstage - Plan, run, and analyze your event— all from one place
Speak up Live - Anyone can ask questions - the team votes on the best ones.
Meetup for iOS and Android - Discover groups that are all about the things you love
Hypersay Slides - The next generation interactive presentation tool