Seen demodemo.com?

You can do basically the same at no cost with Wink

See: http://www.debugmode.com/wink/

From their website:

Wink is a Tutorial and Presentation creation software, primarily aimed at creating tutorials on how to use software (like a tutor for MS-Word/Excel etc). Using Wink you can capture screenshots, add explanations boxes, buttons, titles etc and generate a highly effective tutorial for your users.
Here is a sample Flash tutorial created by Wink.

Very interesting and easy to work with.

Highly recommend.