ScribbleScreen is a presentation tool allowing you to write directly onto the screen, drawing the attention of the audience to items which can be in windows from completely separate applications, high-light items as you speak about them, sketch a quick diagram or type some text.
ScribbleScreen works by capturing an image of the screen at the moment it is launched; thereafter drawing occurs on top of this screen image as a background. This background can take over the whole screen (the other applications still running, but hidden) or can be in a smaller side window so you can see the other applications.
This is a great tool for teachers and students when presenting computer skills or a set of instructions on the screen that the class has to follow carefully. I love this, it is so simple!
ScribbleScreen is a freeware application for Mac OS X 10.3.x/10.4.