What are some alternatives?
Mentimeter - a web-based polling tool for workshops, conferences & events
Hypersay - Goodbye old slides. Hello interactions!
Wooclap - A web-based platform that helps teachers boost participation and measure the level of understanding of students' in class thanks to smartphones.
Glisser - Glisser makes presentations interactive – it takes regular PowerPoint, Keynote or PDF slide decks and pushes them out live to audience mobile devices. Your audience can then interact with the presenter with via polls, Q&A, voting and much more.
Pigeonhole Live - Driving meaningful conversations. At meetings and conferences, increase audience engagement and satisfaction while gaining valuable insights. Sign up for Free.
DirectPoll - DirectPoll offers tools to create and conduct polls in a minute.