Wren - Offset your carbon footprint by saving rainforests
Treepoints - Fight climate change and earn rewards
Offset My Ride - Offset your 2016 Uber and Lyft rides with Carbon Credits
YAYZY - Track the carbon footprint of each purchase in real-time
Klima - Go carbon neutral
EcoCart.io - Free e-commerce plugin for merchants to offer carbon neutral orders to their customers.