Wren - Offset your carbon footprint by saving rainforests
Offset List - Companies that are offsetting their carbon emissions.
Cloverly - An API for carbon offsets 🌎
Cloverly for Slack - Perform carbon offsets directly from Slack
Treeapp - Plant a tree for free, every day, in less than a minute
UberNeutral - Offset carbon emissions for every Uber you’ve taken