ENERGY STAR Partners:
Energy Star, joint program of the U.S. Environmental Protection Agency and the U.S. Department of Energy, offers rebates, special offers or credits time to time through there partners.
Use link below to find current rebates.
http://www.energystar.gov/index.cfm?fuseaction=rebate.rebate_locator
Renewable energy Rebates/Incentive:
State, local government and/or federal government offers incentive/rebates for renewable energy source.
DSIRE, is a comprehensive source of information on state, local, utility, and federal incentives that promote renewable energy and energy efficiency. Use link below to search.
http://www.dsireusa.org/
Your Utility Company:
Your utility company might offer rebates for throwing out that old washing machine and buying new. Check out your utility company’s website. In california, PG&E offers lot of such rebates, check it out at http://www.pge.com/myhome/saveenergymoney/rebates/