Free Mac program: http://www.techsmith.com/download/jing/default.asp
Free Windows program: http://www.techsmith.com/download/jing/default.asp
Website: http://screencast-o-matic.com/
Website: http://www.screenr.com/
Paid Mac program: http://www.amazon.com/gp/product/B006U8NZZS/ref=as_li_ss_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B006U8NZZS&linkCode=as2&tag=edshelf-20
Paid Windows program: http://www.amazon.com/gp/product/B008EQUD4U/ref=as_li_ss_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B008EQUD4U&linkCode=as2&tag=edshelf-20