Prezi is a PowerPoint replacement option that exists in the cloud. Anyone who has sat through even one boring PowerPoint slide deck knows that they can be more of a distraction than a tool. Prezi is a smooth and graphically interesting option that can be accessed from any internet connected computer and many mobile devices. While you can also download a copy for offline use, some of the multimedia options rely on an internet connection and are therefore lost.
The zooming capabilities make the visual experience much more interesting than a standard overhead presentation. The ability to frame new segments within other segments of information allows you to use the location of information on the screen to become part of the message.
Check out a quick demonstration of Prezi!