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 Macintosh 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.
 

ScribbleScreen is a freeware application for Mac OS X 10.3.x/10.4.

Download version 1.4.1 here... (168 Kb download) (This version includes support for multiple monitor presentations, and activation via a hot key when running from the background to work better with PowerPoint, as well as better full screen support under Tiger.)

For further information contact the author
Neville Smythe at
Neville.Smythe@anu.edu.au