It is nothing but a Google powered search engine that is designed for saving electricity. Yes instead of using of white color as google search background, using this black color background we can save some electricity.

Every time you load Google with their white background your (CRT) monitor is using roughly 74 watts of power, but every time you load up Wattoogle your monitor is using about 59 watts of power for a savings of 15 watts!

For indicating this things, this wattoogle site comes with the quote Energy saving search

try this
www.wattoogle.com