FreshStatus - Better status pages in 1-click, FREE FOREVER
Kahoot! - Kahoot! makes it easy to create, play and share fun learning games in minutes—for any subject, in any language, on any device.
statuspage - A simple self-hosted status page site with an API written in Django under the BSD license.
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.
Avaya one-X Agent - Other Customer Service
Mentimeter - a web-based polling tool for workshops, conferences & events