Ombrelle sits in the menu bar and dims everything except the window you’re actually working in, so a dozen open apps stop competing for your eyes. Three presets — Focus, Flow, Evening — adjust how aggressive the dimming gets, and you can exclude specific apps or displays (music players, a second monitor) from the effect entirely. It’s a $11.99 one-time purchase, positioned as a modern take on HazeOver, and needs macOS 14 Sonoma or later.