Prezi is an online presentation tool that enables you to create radically different presentations from what we're used to with Powerpoint. Instead of individual slides, you create your presentation on one large canvas and use set up your presentation to navigate around that canvas. Below is a Prezi presentation I just threw together in about 20 minutes. (At this point, you have to keep clicking the forward arrow to go through the presentation - I haven't yet figured out how to make it play video-style.)
It's very simple to use; I created this one after watching about 5 minutes worth of tutorials on their website. However, because it's simple to use, it seems like the functionality is a bit limited. I haven't explored all of the options yet, so the above presentation is very basic, but you can see immediately the different style Prezi uses and how this could make for more interesting - and better organized - presentations.
If you want to try it out, go to http://prezi.com/profile/signup/ and click the link for Student/Teacher Licenses. The free educator version has more features than the free public one. All that is required is to sign up with your college email address and provide the college's website address when asked.