If you have ever wanted to be able to record what you were doing on your computer screen for either archive or playback at another time (think tutorials, review, video, etc), then this is the software you need. Camtasia has long been recognized as the leader in screencasting software. The only downside is that they do not have a Mac version yet, but you never know. I heard rumor it might be in the works.
So, thanks to a post by Miguel Guhlin on this offer, you can go download Camtasia’s last version (3.1) for free. Considering the newest version (4.0) runs around $100 or so, this is a great deal. Take advantage of it. It is an awesome tool to use in the classroom.