I just found this very cool screencast creation tool that is free. It's called Jing. Installation is quick and pretty easy (though it does require the .NET 3.0 libraries for the Windows version).
Here's a sample screencast, a quick demo of cscope as a development tool.
I'm in LOVE with screenflow. And while it's not free, it works super great and the screencasts come out looking perty and more usable.
jing is great though. nice find.