VirtualBox is a powerful x86 and AMD64/Intel64 virtualization product for
enterprise as well as home use. Not only is VirtualBox an extremely feature
rich, high performance product for enterprise customers, it is also the only
professional solution that is freely available as Open Source Software under
the terms of the GNU General Public License (GPL) version 2.
Presently, VirtualBox runs on Windows, Linux, Macintosh, and Solaris hosts and
supports a large number of guest operating systems including but not limited to
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.