TurningPoint is software to integrate questions into power point presentations so that participants can answer the questions using a small RF transmitter, and the answers can be instantly recorded and processed in different ways. It has many polling functions with which I am not very familiar, but it can be a useful teaching tool. The software is free, but you purchase the hardware it works with.
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.