DOSBox is an emulator program that emulates an IBM PC compatible computer running a DOS operating system.

FreeDOS (formerly Free-DOS and PD-DOS) is a free operating system for IBM PC compatible computers. It intends to provide a complete DOS-compatible environment…

Script Creation Utility for Maniac Mansion Virtual Machine (ScummVM) is a set of game engine recreations.

GRUB (GNU GRand Unified Bootloader) is a boot loader package from the GNU Project.