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), DOS/Windows 3.x, Linux (2.4 and 2.6), Solaris and OpenSolaris, OS/2, and OpenBSD.
VirtualBox is being actively developed with frequent releases and has an ever growing list of features, supported guest operating systems and platforms it runs on. VirtualBox is a community effort backed by a dedicated company: everyone is encouraged to contribute while Oracle ensures the product always meets professional quality criteria.
Supported OS: Windows XP, Server 2003, Server 2008, Windows 7, Server 2012, Windows 8/ 8.1, Windows 10 (32-bit and 64-bit).
Mac OS X hosts: 10.8 (Mountain Lion), 10.9 (Mavericks), 10.10 (Yosemite)
Linux hosts (32-bit and 64-bit): Ubuntu 10.04 to 15.04, Debian GNU/Linux 6.0 (“Squeeze”) and 8.0 (“Jessie”), Oracle Enterprise Linux 5, Oracle Linux 6 and 7, Redhat Enterprise Linux 5, 6 and 7, Fedora Core / Fedora 6 to 22, Gentoo Linux, openSUSE 11.4, 12.1, 12.2, 13.1, Mandriva 2011
Homepage – http://www.virtualbox.org