Caffeinated

Caffeinated is a free, open-source utility that stops your device's display from automatically sleeping or dimming. With a simple click on its system tray icon, you can toggle this 'keep awake' function on or off. It's perfect for reading long documents, watching presentations, or any task where constant screen interaction isn't possible. Lightweight and unobtrusive, it runs quietly in the background, giving you full control over your display's power settings without navigating through complex system menus.