THE best presentation creation tool I've ever seen. Once you get used to it you can create awesome presentations and the free access section gives you quite a bit of storage. You create them online and then download them as a package to play anywhere. Very cool!
I'm not a big user of graphic organisers myself, but if you're into them then this site will be very useful. It looks like the secret hiding place of graphic organisers.
Interesting that 'death by PowerPoint' is alive and kicking even in the top echelons of society... I agree that PowerPoint can give us a false sense of informational mastery.