Download: http://archive.info-mac.org/gui/jiggler-12.hqx
Jiggler is a little freeware utility that jiggles your mouse
periodically, preventing sleep and screensavers from interrupting the
jobs your computer is doing. No more having to change your sleep and
screensaver delays back and forth in System Preferences -- just jiggle!
New in version 1.2:
Expanded the ability to turn on jiggling when particular
applications are running
Fixed minor bugs
Jiggler's home page: http://www.sticksoftware.com/software/Jiggler.html
Stick Software's home page: http://www.sticksoftware.com/
Stick Software email: support@sticksoftware.com
Jiggler may be included on CD-ROMs.
This is version 1.2 of Jiggler.