Kill-A-Watt
Kill-A-Watt is an electricity monitoring device that shows you how much electricity you're consuming currently or in the short-term (a day or a week). This device is designed to monitor electricity consumption of individual appliances. Setting up this device is very easy, just plug the device in the wall socket, then plug the appliance on the Kill-A-Watt socket. Kill-A-Watt has a digital display in which you can see information about the energy consumption of your appliance. Unfortunately, there is no way to port data from the Kill-A-Watt to another device or computer.