Kill-Ur-Watts Allows you to track electricity use over time and provides plans to reduce energy. Green Outlet Calculates monthly cost by analyzing how much energy each household appliance uses. Nest Mobile Changes the temperature of your house from your iPhone when paired with the Nest Learning Thermostat. My CO2 Calculator Tracks your daily activities to calculate your carbon footprint. Light Bulb Finder Locates stores where you can find inexpensive, energy-saving light bulbs. CodeGreen Energy Analyzes and compares the energy efficiency of nearby buildings. JouleBug Motivates users to lead more sustainable lifestyles by making energy-saving a game.