Wren - Offset your carbon footprint by saving rainforests
Tesla Solar Roof - Invisible roof tiles that power your home 🏠
Klima - Go carbon neutral
Electricity Map - Live CO2 emissions of electricity consumption
Capture - A great free screen capture utility that allows you to capture either a window or the desktop and save it to either a file or the clipboard.
Carbon Visualiser - See your CO2 in burgers, basketballs, pufferfish and more