VICE
Versatile Commodore Emulator supporting C64, C128, VIC-20, PET, and more Commodore systems. Emulates Commodore PET, Commodore VIC20, Commodore PLUS4, Commodore CBM, Commodore 64, Commodore 64DTV and 1 more. Runs on Windows, macOS, Linux, BSD, DOS. Licence: GPLv2+.