NoSleep is described as 'Makes closing of your MacBook lid possible without going to a sleep mode. Now you shouldn't have to plug your mouse and monitor to stay computer awake - just activate it by clicking a menu bar icon or check a tick in the System Preferences and continue downloading' and is an app in the sport & health category. There are more than 25 alternatives to NoSleep for a variety of platforms, including Mac, Windows, Linux, Flathub and F-Droid apps. The best NoSleep alternative is Amphetamine, which is free. Other great apps like NoSleep are Stimulator, Caffeine for Mac, NeverNap and InsomniaZ.