Zen Mode for macOS - Hide Everything. Mute Everything.
Caffeine for Mac - Caffeine is a tiny program that puts an icon in the right side of your menu bar.
One Switch - All your mac toggles in one place
KeepingYouAwake - A Caffeine clone for macOS Yosemite, El Capitan and Sierra (including Dark Mode).
Don't Go to Sleep Please - "Don't Go to Sleep Please" prevents sleep mode on the Mac until applications or processes are done.
Caffeine for Windows - Prevent your computer from going to sleep