Homepage : https://www.virtualbox.org/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. See "About VirtualBox" for an introduction.
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.
What's new :
Download : https://www.virtualbox.org/wiki/DownloadsVirtualBox 4.1.12 (released 2012-04-02)
This is a maintenance release. The following items were fixed and/or added:
VMM: fixed VERR_NOT_SUPPORTED and VERR_RAW_MODE_INVALID_SMP guru meditation due to an invalid reschedule to raw mode (bug #10370)
VMM: fixed PDMCritSectLeave guru meditation under rare circumstances with SMP guests
VMM: proper Math Fault handling with certain legacy guests (bug #9042)
NAT: fixed a socket leak under certain conditions
Storage: better sanity check against reading beyond end-of-file
Audio: fixed a crash in the NUL audio backend (bug #10374; 4.1.10 regression)
HGCM: fixed a crash during savestate under rare circumstances
VBoxSVC: several locking fixes
VBoxManage: return the correct error code if controlvm savestate failed (bug #10134)
Guest Additions: VBoxService should not crash on exit (bug #10326; 4.1.10 regression)
Windows Additions: set the correct time stamp when a file is closed (bug #6473)
Windows Additions: better help if the DirectX backups are not properly installed
Linux Additions: Linux 3.4-rc1 compile fixes
Thank you for the info and change log William and i appreciate the link provided...