Quite often in one's travels around the web, you may wish to record or demonstrate something. CamStudio is a simple, free, recording tool. This posting provides a screencast tutorial, access to the software, and some examples:
Finally, some editorial comments ... CamStudio is a great tool, but given it's inability to take individual screen shots (like a digital camera) and then smooth motion paths between between mouse clicks, file size can grow VERY LARGE. You need to get things right the first time around; there is no second chance to edit and improve your content.
Having said all of that, as a simple, cost effective (i.e. free) screencast recording tool for webcasts and tutorials ... it is does the trick.