OnlineQuestions.org - OnlineQuestions.org is an online tool to ask and upvote questions during large lectures, classes...

Pingo - Optimize images for the web quickly 🖼️⚡

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.

Imakiku - Imakiku is an audience response system for real-time voting, posting comments, and surveying.

Kahoot! - Kahoot! makes it easy to create, play and share fun learning games in minutes—for any subject, in any language, on any device.

Ideahunt.io - Ideahunt.io is a tool that is now available as Svava, it allows you to make every meeting successful, and provides you the features to conduct interactive meetings.