Clikapad - ppvote software portfolio is a PowerPoint add-in that has been specifically designed to be used with CLiKAPAD audience response system hardware.
Sparkup - Sparkup is an audience interaction platform for live and virtual meetings and events. Easily create interactive Q&A, word clouds, live polls and quizzes to engage your audience.
Imaginators - Create interactive presentations
slideasy.io - Interactive online presentations and surveys for your audience
BlueJeans - Blue Jeans Network maintains a cloud-based video collaboration service that enables video conferencing using practically any device.
Mentimeter - a web-based polling tool for workshops, conferences & events