Highlight is a little tool that allows you to draw on the screen on top of your applications.
It supports global shortcuts to show/hide the application, an undo stack and a variety of shapes.
For more info, please read the manual on http://krugazor.eu/highlight/
Highlight what is important for your audience to understand, to make your demos and presentations more lively and focused!
The version 1.6 brings customizable global shortcuts and a few bugfixes for 10.7/10.8