Offset List - Companies that are offsetting their carbon emissions.
Wren - Offset your carbon footprint by saving rainforests
Cloverly - An API for carbon offsets 🌎
Website Carbon Calculator - Find out the how much CO2 your website emits
Treeapp - Plant a tree for free, every day, in less than a minute
UberNeutral - Offset carbon emissions for every Uber you’ve taken