Zeetings - Turn your presentations into interactive conversations
SlideLizard - Powerpoint plug-in for live audience interaction
Crowd Mics - Crowd Mics provides solutions to turn phones into microphones for live events to boost audience interaction.
Pingo - Optimize images for the web quickly 🖼️⚡
SlideShare - Discover, Share, and Present presentations and infographics with the world’s largest professional content sharing community.
Imakiku - Imakiku is an audience response system for real-time voting, posting comments, and surveying.