1. Screen-cast-o-matic (completely free)
2. Screen Recorder Gold (free trial)
3. Adobe Captivate 3 (30 day free trial)
2- Screen Recorder Gold.
Many many features, here is a brief summary.
Real time recording of desktop, adjustable area, or snap to window/ application.Automatic annotation.
Recording is converted to slides which can be fully edited, annotated and interactive content added.
Recording is published in flash format.Sound recording/ narration.
30 Day free trial.
The new version of Captivate is much more expensive than in predecessors but has increased interactivity/ multimedia functions. I'm using version 1. If you need a spot on annotated tutorial this is the software to do it. At a price.