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