CinnamonSleepimerApplet
Based on: https://nickdurante.github.io/development/Writing-a-Cinnamon-Applet/
An Applet for Cinnamon that shows the time remaining until the System will shutdown. Will alert with 5 Minutes left.
To install the applet move the "files/sleepTimer@jd" folder into your "/home/jd/.local/share/cinnamon/applets" directory.