Energy Saver (Google Gadget)

From Google:

This gadget enables and optimizes your computer's power management settings to help save on energy. We're committed to helping to build a clean energy future. As our business grows, we want to make sure we minimize our impact on the Earth's climate. So we're taking every step we can to implement innovative and responsible environmental practices across our company to reduce our carbon footprint, ensure efficient computing and help our employees be green.