Cpuspeedy is simple and easy to use program which allows you to change the clock speed and voltage of the CPUs on the fly, using the Linux's CPUFreq driver.
Use it and you should save battery consumption and reduce the temperature of your laptop.
wxCliNUT is a NUT (Network UPS Tools) graphical client (GUI) designed to display the status of one or more UPS. Coded with the great multi-platform open source library wxWidgets, so it runs natively under Windows, Unix (GTK) and MacOS.