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. See ' About VirtualBox' for an introduction. 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. VirtualBox is a powerful x86 and AMD64/Intel64 virtualization product for enterprise as well as home use. Looking for a new challenge? We're hiring a VirtualBox senior developer in 3D area (Europe/Russia/India). Looking for a new challenge? We're hiring a System Administrator/Quality Engineer (Germany). Looking for a new challenge? We're hiring a VirtualBox Principal Software Developer (US, UK, Romania). Oracle today released a 6.1 maintenance release which improves stability and fixes regressions.