Link to Wink (Freeware)
"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 of your software, use images that you already have, type-in explanations for each step, create a navigation sequence complete with buttons, delays, titles etc and create a highly effective tutorial for your users. "
Ok, it is not as good as RoboDemo 5.0 (Macromedia). However, it is free and user-friendly . It enables you to publish in SWF format (not bandwidth intensive). It also allows you to export recorded tutorials as HTML or PDF. In short, it has most of the basic features to create tutorials on how to use software (except audio). Unless you are an expert or a Picasso of simulation, this tool is absolutely great. Try it out!