Kahoot! - Kahoot! makes it easy to create, play and share fun learning games in minutes—for any subject, in any language, on any device.
Tea Minus - The multi-device office drink round app
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.
Evabot for Slack - Send coffee/beer as an appreciation gift to colleagues
Mentimeter - a web-based polling tool for workshops, conferences & events
QuizBreaker - A fun online quiz game for teams to get to know each other