Simple Poll - The easiest way to create polls in Slack
Kahoot! - Kahoot! makes it easy to create, play and share fun learning games in minutes—for any subject, in any language, on any device.
Vizia - Add quizzes and polls to your embedded videos
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.
XXCopy - A versatile file management tool for Microsoft Windows
Mentimeter - a web-based polling tool for workshops, conferences & events