Green software to monitor and reduce energy usage

Computers use a lot of power. You can make your own computer as energy efficient as possible using these simple software tools. Windows XP and Vista (as well as Mac OSX and open source alternatives not covered here) include power management software. The programs we look at here go much further and allow you to fine-tune your computer's power management strategy. You'll save money on your energy bills and, more importantly, you'll be working toward minimizing your computer's impact on Mother Earth.