Monitor your Mac's activity with a bouncing ball.

>   * MenuBall is an absolutely useless control panel that puts a
> bouncing ball in your menu bar. It won't slow down your Mac and it
> shouldn't crash (but use it at your own risk). Should the ball ever
> leave a mark in your menu bar, don't panic: it is harmless, just
> switch to another application to have the menu bar redrawn properly.
>
>   * There's only one smart use for MenuBall: since the ball moves
> one step at each WaitNextEvent call, you can use it to monitor the
> system activity. If the ball stops, the Mac probably won't respond
> to user actions and may even be hung; if it moves slowly, the front
> application is being friendly to other processes and giving up a lot
> of processor time; if it moves fast, then the front application is
> eating most of the CPU time (and possibly wasting it).
>
>   * If you can bear MenuBall for more than half an hour, you've
> earned it.
>

>
> ? Excerpt: is from "MenuBall_docs.txt"

First DL is v2.3.1 ? July 1996.
Second DL is v2.3.1-J ? July 1996.
Third DL is v2.1 ? March 1995.
Fourth DL is v2.0 ? September 1993.

Compatibility
Architecture: 68k