Blabberize allows you to upload a photo and make the mouth move while you record an audio track.  You can also have students comment on another's blabber.  Here is a quick sample I made:

http://blabberize.com/view/id/263389    

Glogster is a great site where your students can make interactive posters. With just a click of the mouse on a menu students can enter text, links, images, music, videos, and more. Glogster gives a whole new twist to those paper posters!

I was introduced to this program recently at a conference where a primary student from a local school taught me how to "glog" while showing me the glog she made about penguins. It really is the perfect tool to use for primary grades all the way up through high school.

At this site you can see the latest glogs that have been published:
http://edu.glogster.com/new/

There is a great mini-tutorial to get you started here:
http://www.brighthub.com/education/k-12/articles/57951.aspx

And tutorials for you visual learners are available if you scroll down to the resources section of the glogster homepage:
http://edu.glogster.com/

This online presentation software allows your entire presentation to be displayed on one screen, but you choose the order in which you want the items to be zoomed in on.

To get an idea of what a Prezi is, view some of the sample presentations here
http://prezi.com/explore/

To sign up for a free educator's account, go to:
https://prezi.com/profile/registration/edu/?license_type=EDUENJOY

3 lessons to get you started can be found here:
http://prezi.com/learn/

Wordle is a site for generating "word clouds" from text that you provide. The more a word appears in the text, the bigger it is in the cloud.

Jonathan Wylie gives 10 great way to use Wordle at: http://www.brighthub.com/education/k-12/articles/58905.aspx

Here is a sample Wordle I created by pasting in the words of our National Anthem.