1) Audacity: http://audacity.sourceforge.net
Audacity is free, open source software for recording and editing sounds.

Audacity in Education: http://audacityined.wikispaces.com/
Audacity Tutorial: http://audacity.sourceforge.net/help/tutorials
Another Audacity Tutorial: http://www.edhsonline.org/other/audacity/

2) JING: http://www.jingproject.com
JING is the always-ready program that instantly captures and shares images and video from your computer to anywhere.

How do I use Jing? http://blog.jingproject.com/2007/07/how_do_i_use_this_thing_called.html
Jing FAQ: http://www.jingproject.com/faq.asp

3) Saving Videos from Youtube and other video sites to your computer - Demonstration Only
Tube Sucker: http://www.newrad.com/software/tubesucker/default.asp