Is this the simplest Progressive Web App ever? It's just a black browser tab / window / screen, but it can help you focus, rest your eyes, manage screens, test PWAs, or serve as a presentation background or privacy screen. Really?

An application that displays a full-screen window in pure black for the Windows operating system. Exit can be initiated by simply pressing any button.

Mouse activated backup for when the screen dies

Take Screen Shot With Black Screen App !

Generate pure black screen videos with FFmpeg. 5 resolutions × 7 durations × 3 formats, optimized with stream_loop.

Universal graphics switcher for Kali Linux to fix Black Screen and TTY errors on hybrid systems and portable drives.

Black Screen Helper

Recovery toolkit + auto-watchdog for ASUS ROG laptops where the AMD Radeon 610M iGPU fails with Code 43 and blacks out the built-in screen. Switches the GPU MUX to Ultimate (panel -> NVIDIA), forces native resolution, and self-recovers at logon/wake.