I use SnagIt from Techsmith on a regular basis for creating screen shots for some of the posts I publish here as well as for some writing on do for InfoQ or even some training work I perform. I came across some free versions of both SnagIt and Camtasia Studio (screen casting tool).
These tools are not the latest versions but appear to be eligible as upgrades to the latest versions.
You can download and get a license for Snagit here and for Camtasia Studio here. Enjoy, both are great tools.