Oracle - ( Open Source)
VirtualBox is an easy and elegant solution for those who want to control a computer from another computer.
VirtualBox offers virtualize your operating system (OS) guests on a host machine. Called hypervisor, the application supports Windows OS X, Linux, Mac, Solaris, FreeBSD, etc.. as host, Mac OS X missing the call as a guest.
It also includes a remote access via HTTP protocol, convenient for demonstrations on a clean system. The ability to manage multiple states of the system is particularly interesting and its interface is very simple.
Virtualization solutions allow installing an operating system on a virtual machine using the resources of the host PC , thus enjoying very good performance. In the genre, several solutions are known for their ease of use, such as VMware Workstation , Parallels Desktop or Microsoft Virtual PC 2007 SP1.
A virtual machine is a useful way to use two operating systems simultaneously and harmless to the host computer. There is the possibility to install Linux on a virtual machine on Windows and vice versa .
GUI: don't check if the Extension Pack is up-to-date if the user is about to install a new Extension Pack.
GUI: fixed a possible crash when switching a multi-monitor VM into full-screen or seamless mode.
GUI: fixed non-literal shortcuts if the keyboard is not captured (5.1.10 regression; Windows hosts only).
GUI: several mini-toolbar fixes in full-screen / seamless mode (X11 hosts only).
GUI: don't crash on restoring defaults in the appliance import dialog.
Windows Additions: another fix for automatic logins for Windows Vista and newer.
ICH9: fix for Windows guests with a huge amount (>64G) of guest memory.
BIOS: fixed El Torito hard disk emulation geometry calculation.