Mahara
This page was created using Mahara!
More Mahara examples are here and the Coventry University Mahara guide is here:
http://tinyurl.com/coventry-e-portfolio
Padlet
We give you a blank wall. You put anything you want on it, anywhere. Simple, yet powerful.
You go to Padlet and you can see an option called Build a Wall.
You can share the URL of the wall with anyone else for them to add.
(Note: the non-login version is time-limited but the items on it are frozen.)
Example (see left)
I couldn't get the example to embed into Mahara, so there's just an image shown here. It can be exported; the PDF version follows.
Padlet Tutorial by Jesse Black-Allen
Padlet's PDF export of the example
Prezi
Look at some examples that use Prezi. How can you improve your PowerPoint? Don't use Prezi only as another way of presenting a PowerPoint.
Having said that, one way to get started with Prezi is to export a PowerPoint. 
Another way is to use a template.
Prezi Example - Finding Technology
This example was created from one of the Prezi templates.