Free Screencast software ?

[JedClampett]

I'm looking for a free Camtasia Studio alternative. So far I have found these two compilations:

http://www.webresourcesdepot.com/10-free-screen-recording-softwares-for-creating-attractive-screencasts/

http://www.1stwebdesigner.com/freebies/free-screencasting-tools-video-tutorials/

Can anyone give recommendations for their preferred screencasting software please?

TIA

Jed