Wren - Offset your carbon footprint by saving rainforests
Lolli - Earn bitcoin when you shop online
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.
Freebird - Freebird is a cashback and shopping rewards platform that allows anyone to participate at no cost.
Treepoints - Fight climate change and earn rewards
Earny.co - Win prizes on Amazon purchases