Glisser is described as 'makes presentations interactive – it takes regular PowerPoint or Keynote slide decks and pushes them out live to audience mobile devices, slide-by-slide, as they are presented' and is a Q&A Service in the Business & Commerce category. There are more than 50 alternatives to Glisser for a variety of platforms, including Online / Web-based, iPhone, Windows, Mac and iPad. Most alternatives are Q&A Services and Customer Feedback Managers. The best alternative is Discourse. It's not free, so if you're looking for a free alternative, you could try Prezi or Slido. Other great apps like Glisser are Microsoft Powerpoint (Paid), SlideShare (Free), Question2Answer (Free, Open Source) and AhaSlides (Freemium).
Prezi allows anyone who can sketch an idea on a napkin to create and perform stunning non-linear presentations with relations, zooming into details, and adjusting to the time left without the need to skip slides.
Slido is the industry-leading audience interaction platform. It helps users to get the most out of meetings and events by crowdsourcing top questions and engaging participants with live polls and quizzes.
Mentimeter is a cloud-based tool that lets you engage and interact with your audience in real-time. You pose the questions and your audience can give their input via a mobile phone or any other Internet connected device.