The Unofficial Apple Weblog has a good roundup of free through expensive screencasting applications for OSX (Mac). Taking the top spot for freebies is Jing. Screenflick gets the nod for the “casual user”, and ScreenFlow is the best overall. I love Jing for quick and dirty, and I own iShowU and SnapZ Pro for longer captures, but have never tried out Screenflick – guess I’ll go do that.