VirtualBox for Linux 3.0.10-54077 is a System Utility product from virtualbox.org, get 5 Stars SoftSea Rating, VirtualBox is a strong x86 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). See "About VirtualBox" for an introduction.
Presently, VirtualBox runs on Windows, Linux, Macintosh and OpenSolaris 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, 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 Sun ensures the product always meets professional quality criteria.
With VirtualBox, you can run unmodified operating systems -- including all of the program that is installed on them -- directly on top of your existing operating system, in a special environment called a "virtual machine". Your physical computer is then usually called the "host", while the virtual machine is often called a "guest".
VirtualBox allows the guest code to run unmodified, directly on the host computer, and the guest operating system "thinks" it's running on a real machine. In the background, however, VirtualBox intercepts certain operations that the guest performs to make sure that the guest does not interfere with other programs on the host.
The techniques and features that VirtualBox provides are useful for several scenarios:
Operating system support. With VirtualBox, one can run program written for one operating system on another (for example, Windows program on Linux) without having to reboot to use it. You can even install an old operating system such as DOS or OS/2 in a virtual machine if your real computer's hardware is too advanced to be supported.
Infrastructure consolidation. Virtualization can significantly reduce hardware and electricity costs. The full performance provided by today's strong hardware is only rarely really needed, and typical servers have an average load of only a fraction of their theoretical power. So, instead of running many such physical computers that are only partially used, one can pack many virtual machines onto a few strong hosts and balance the loads between them. With VirtualBox, you can even run virtual machines as mere servers for the VirtualBox Remote Desktop Protocol (VRDP), with full client USB support. This allows for consolidating the desktop machines in an enterprise on just a few RDP servers, while the actual clients only have to be capable of displaying VRDP data.
Testing and disaster recovery. Once installed, a virtual box and its virtual hard disk can be considered a "container" that can be arbitrarily frozen, woken up, copied, backed up, and transported between hosts. On top of that, with the use of another VirtualBox feature called "snapshots", one can save a particular state of a virtual machine and revert back to that state, if necessary. This way, one can freely experiment with a computing environment. If something goes wrong (e.g. after installing misbehaving program or infecting the guest with a virus), one can easily switch back to a previous snapshot and avoid the need of frequent backups and restores. The license of this windows utility software is Freeware, you can free download and free use this Windows Utility software.