APSW Watt-U-Use
Have you ever wondered how much money that light left on all night is costing you in bills? Or that stereo that just seems to never stop playing from the kids room? How about which of your household appliances contribute the most to your monthly energy bills? ... Lets you add any appliance (lights, stereo, washingmachine etc). ... Shows your estimated energy bill for the month, quarter and year. ... Allows for any discounts or rebates on energy bills. ... Calculates kilowatt hourly charge rates.
http://www.allpurposesoftware.com/downloads/wattuuse.zip - 4Mb - Download - Screenshot

WatchOverEnergy
WatchOverEnergy, an energy tracking and management software for Windows 9x, 2000, XP, NT. This is a freeware product that will manage stand-by mode, and track your energy savings when your computer monitor is in stand-by mode. WatchOverEnergy program can activate stand-by mode for your monitor... It will track energy saving in watt-hours and will calculate your energy saving in dollars. ... Another important feature is that WatchOverEnergy software shows your energy saving details. ... With WatchOverEnergy, you can reduce your monitor's energy costs by at least 20%.
http://www.aks-labs.com/watch_energy_setup.exe - 769Kb - Download - Screenshot