Bochs
1994 Open source · LGPL-2.1 Downloadable
Bochs is a pure-software x86 emulator that simulates a full IBM PC compatible, including CPU, memory, BIOS and common peripherals. It can boot and run MS-DOS, every generation of Windows and other operating systems such as OS/2 and ReactOS, and is widely used for OS development and debugging.
Runs on: Windows, macOS, Linux