Imakiku - Imakiku is an audience response system for real-time voting, posting comments, and surveying.
Ludus - Limitless creativity for your slides.
Pingo - Optimize images for the web quickly 🖼️⚡
SlideLizard - Powerpoint plug-in for live audience interaction
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.
Zeetings - Turn your presentations into interactive conversations