stefansundin.github.io
SuperF4 is a Windows-only utility that kills the foreground program when Ctrl+Alt+F4 is pressed, which differs from Alt+F4 since programs can refuse to quit. A program can also be killed by pressing Win+F4 and clicking a window. It is free software under GNU GPL v3, with v1.4 available in portable 64-bit and 32-bit versions.