TreeClicks is a Chrome and Firefox extension that plants trees for free when you shop online at your favourite online stores. Shopping prices remain the same.
Plantyflix - Watch Netflix and plant trees
OneTab - Whenever you find yourself with too many tabs, click the OneTab icon to convert all of your tabs into a list. When you need to access the tabs again, you can either restore them individually or all at once.
TreeCard - The wooden debit card that plants tree powered by Ecosia
Session Buddy - Manage Your Browser Sessions
Tab for a Cause - Raise money for charity with each new tab you open
Tabs Outliner - Next Generation Session, Windows, Tabs Manager and a TooManyTabs Solution That Really Works.