SlideLizard - Powerpoint plug-in for live audience interaction
Prezi - Welcome to Prezi, the presentation software that uses motion, zoom, and spatial relationships to bring your ideas to life and make you a great presenter.
Ludus - Limitless creativity for your slides.
Slides - Slides is a place for creating, presenting and sharing presentations. The Slides editor is available right in your browser. Unlike traditional presentation software, like PowerPoint, there's no need to download anything.
Zeetings - Turn your presentations into interactive conversations
Slidebean - Presentations that design themselves