Techsmith are currently offering version 3 of Camtasia free of charge. Simply download the demo version of Camtasia Studio 3 and request a registration key. The current paid for version is version 5, so the free version doesn’t have all the features you’d expect in Captivate or Mimic . You can upgrade the free version to version 5 for half price.
http://download.techsmith.com/camtasiastudio/enu/312/camtasiaf.exe
Thanks for the link, it will be a nice to have.
I was searching for a source page for info on requesting the registration key, and found it here.
http://www.techsmith.com/camtasia/pcpls.asp