Monitor Off Utility - Monitor Off Utility is a free program that allows you to take control of your monitor's...
Pulover’s Macro Creator - Pulover’s Macro Creator is a Free Automation Tool and Script Generator.
Display Power Off Utility - Display power off utility.
AutoKey - A Python 3 port of AutoKey, the desktop automation utility for Linux and X11.
ScreenOff - Turn off Windows screen with a click
Hammerspoon - This is a tool for powerful automation of OS X.