I have for some time been looking for a tool for presentations that highlight mouseclicks for the viewer.
Failing to find one, I took upon me the daunting task of writing one myself. It didn't take long, so I wonder why I couldn't find someone who had done it before.
It is licensed under GPLv3.
Compositing window manager (compiz, awesome, xfwm4, ...)
How to get it
screencast - presentation - mouse highlighter - mouse visualizer - mouse press indicator