Wren - Offset your carbon footprint by saving rainforests
Countdown Screensaver - A Mac screensaver for counting down to a date 🖥🕐
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.
Timetaco - Create your own countdowns, as easy as 3, 2, 1
Treepoints - Fight climate change and earn rewards
Yonks - Day counter app for iOS & Android.