Macromedia Captivate (formerly RoboDemo) automatically records all onscreen actions and instantly creates an interactive Flash simulation. Point and click to add text captions, narration, and e-learning interactions without any programming knowledge.Captivate can automatically generate text captions for you, allowing you effortlessly to generate fully annotated simulations and demos. You can use these simulations as an effective way to show your applications.
Macromedia has a Flashpaper document which compares Captivate with Robodemo 5 and Robodemo 4.
The most appealing feature to me is Visual Timeline and Customizable Quiz. See the comparison here.
Download Macromedia Captivate 2.0 at Adobe Website.