VirtualBox

• Free (GPL -- GNU General Public License) x86 and AMD64/Intel64 vitalization platform that run on Windows, Linux, Macintosh, and Solaris hosts
• Guest system support Windows (NT 4.0, 2000, XP, Server 2003, Vista, Windows 7, Windows 8, Windows 10), DOS/Windows 3.x, Linux (2.4, 2.6, 3.x and 4.x), Solaris and OpenSolaris, OS/2, and OpenBSD
• Download here

Special operation for VirtualBox:

• Shutdown a VM in Guru Meditation status: (Ref : virtualbox.org End user forums for VirtualBox)
  1. Assume Host OS is Windows.
  2. Open a CMD prompt at C:\Program Files\Orcale\VirtualBox
  3. Type the following command, <vm> is case sensitive

VBoxManage controlvm <vm> poweroff