QEMU
2003 Open source · GPL-2.0 Downloadable
QEMU is a fast, portable emulator and virtualizer that can emulate a standard x86 PC platform along with numerous other CPU architectures. On x86 it boots DOS, all versions of Windows and alternative systems such as ReactOS, Haiku and OS/2, using dynamic binary translation or hardware-accelerated virtualization.
Runs on: Windows, macOS, Linux, BSD