Sentinella might sound like name of a posh fragrance but the small app has been designed to keep your OS feeling fresh rather than yourself smelling such.
It does this by monitoring your system resources for a pre-set ‘condition’, and then launching a specified action when this condition is met.
So it can, for example, turn off your computer when the network traffic falls, or play an alarm when your CPU rises above 90% load.
The application comes with an application-indicator for easy panel-based management, too.
Sentinella is a free Qt-written application available for install via the Ubuntu Software Centre.