QEMU

QEMU is a free and open-source emulator and virtualizer. It can perform hardware virtualization, allowing users to run operating systems and programs for one machine architecture on a different architecture, or to run multiple operating systems on a single machine.

It is primarily used by developers, system administrators, and enthusiasts for tasks such as cross-compilation, testing software on various platforms, or running legacy applications in a virtualized environment. QEMU supports a wide range of guest operating systems and hardware emulations.