There’s also Wink, which is free, and while not great, may very well be “good enough”. For additional features like circlies when clicking, I think there’s a plugin or something—check the forums.
I like wink, and I’ve used it, but it won’t work on a Mac (the screen cast machine was a Mac). If you are on Mac and I’d also recommend ishowu, which I like a lot. On a PC, I used Camtasia studio for http://video.derekallard.com and liked it a lot.