Band Saw is a syslog monitoring program for GNOME. It allows the user to define filters that specify which log messages should be drawn to the user's attention. Combined with syslog's remote logging functionality it provides an effective, scalable, and easily deployed monitoring solution.
battery_monitor is a small battery monitoring program for Linux that you can run in the background from your desktop session or launch from the boot scripts. It is designed with simple goals in mind, and provides acoustic and/or visual alerts when your battery level is low or when it is fully charged, so you can take appropriate actions.