Monitor Off Utility - Monitor Off Utility is a free program that allows you to take control of your monitor's...
Zenity - Zenity is a tool that allows you to display GTK dialog boxes in commandline and shell scripts.
Display Power Off Utility - Display power off utility.
AutoHotkey - The ultimate automation scripting language for Windows.
ScreenOff - Turn off Windows screen with a click
Batch MessageBox - Display message boxes from Windows batch files and command line programs.