Note: After Wink received kudos on the Cool Solutions dot com forums, Cool Guys wrote to the author of Wink and received permission to publish this tool.
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, add
explanations boxes, buttons, titles etc and generate a highly effective
tutorial for your users.