Screen Toaster is not only free, also it's a online tool and no need to download software (I like that!) You can use it anywhere anytime. What can you do with it?
* Make screencasts / tutorials / demos etc.
* Record your screen in one click
* Compatible with Windows, Mac OS X, Linux
* Share videos on the Internet in Flash
* Embed them on blogs/webpages or send them by email
Look at an example from iSimplyBlog.com