I think BlueBerry screen recorder is the best ( http://www.bbsoftware.co.uk/BBFlashBack/Home.aspx ) the express edition is free, and the video time and quality are not affected as in some free versions of other softwares. The only thing affected is the editing software, and it is possible to just use an alternative like QuickTime or windows video editor. If you want any more information, start a private conversation with me.
Action is it if you want the trial it has great recording software but for the trial there is a water mark at the top. I'm getting fraps full version soon .