Padlet - Visual boards for organizing anything.
Poll Everywhere - Audience response system that uses mobile phones, twitter, and the web. Responses are displayed in real-time on gorgeous charts in PowerPoint, Keynote, or web browser.
Acadly - Acadly is an all-in-one edtech product that boosts interactivity between professors and students both inside and outside the classroom.
myQuiz.org - myQuiz is an Audience Engagement Cloud Platform
Popplet - Popplet is the simplest application to capture and organize your idea.
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.