Wren - Offset your carbon footprint by saving rainforests
Treepoints - Fight climate change and earn rewards
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.
Klima - Go carbon neutral
Trip to Carbon - A carbon footprint calculation API for travel.
Google Home - Set up, manage, and control your Chromecast, Chromecast Audio and Google Home devices.