Check out the video below if you want to see the screen cast programs in action.
Pros: Easy to install. Simple and clean.
Cons: Not many options. Only records in Ogg vorbis.
Pros: Easy to install. A few more options. Simple and clean.
Cons: Only records in Ogg vorbis.
Pros: Most feature rich. Allows you to select different video formats. Easy to use.
Cons: Apparently no active development for many years. Audio most likely will not work for you and it is quite difficult to get it working.
Pros: Easy to use. Works well. Saves in .mkv so uploading to Youtube.com works well.
Cons: Not as easy to install (not difficult to install though).