QEMU

QEMU is an emulator that emulates many architectures of systems. It is mostly based around the Linux environment and runs via a command prompt.

Supported guest operating systems
An incomplete list of OSes that can run on it.


 * Windows 98
 * Windows ME
 * Almost any version of NT
 * Most versions of Linux
 * BeOS
 * NeXTSTEP, OPENSTEP
 * Most versions of MacOS, along with PPC versions.