Prezi

Prezi - The Zooming Presentation Editor is a rather cool presentation tool, somewhat complicated but if used well the extra work will definitely pay off.

Features

• Pan and Zoom
  Zoom around the prezi canvas to visualize your ideas.
• Import Media
  Import PowerPoint slides, images, videos, YouTube videos, PDFs, etc.
• Prezi Viewer iPad App
  View, retouch and present your prezis from your iPad.
  
• Present Online and Offline
  Present online or download and show your prezi offline.
• Work Together
  Collaborate in real-time, across the room or across time zones.
• Add Storyline
  Use frames and a path to create a cinematic journey.

In my opinion the two (2) outstanding features from prezi that make it really stand out are Storyline  and Present online/offline.
The storyline is super cool because unlike traditional presentation tools that go from slide to slide, line by line, the storyline is more like the telling of a story, which can (if done well) keep the audience engaged and draw them in. Between all the options for adding flips, spins, zooms, images, videos and a whole host of other editing options the hazard of new users becoming overwhelmed and making a mess of their presentation or a simply over saturation of unnecessary special effects that can lead to headaches and incoherent storyline resulting in a counterproductive presentation. Fortunately the user interface is very straight forward and there is lots of information on Prezi's website to make users new at Prezi avoid the common mishaps.

The ability to present online and offline is also useful in my opinion in cases where the project is needed to be accessed by several people and/or multiple locations. Storing an up to date presentation on a cloud drive means everyone involved is able to access the newest version from anywhere without having the bother of emailing every single update.

Prezi is definitely worth a test drive and for everyone who has a regular need for creating presentations and especially students, I highly recommend incorporating Prezi into your technical arsenal because even though Powerpoint is the standard, sometimes you need a more complex presentation tool. 

http://prezi.com/