Kahoot! - Kahoot! makes it easy to create, play and share fun learning games in minutes—for any subject, in any language, on any device.
Conode - A simple editor to organize meetings
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.
Let's Meetup - An easy way to share POIs and addresses in iMessage
Mentimeter - a web-based polling tool for workshops, conferences & events
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.