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 .
# The following items were fixed and/or added:
* GUI: fixed disappearing settings widgets on KDE hosts
* Storage: fixed hang under rare circumstances with flat VMDK images
* Storage: a saved VM could not be restored under certain circumstances after the host kernel was updated
* Storage: refuse to create a medium with an invalid variant (for example Split2G with VDI)
* Snapshots: none of the hard disk attachments must be attached to another VM in normal mode when creating a snapshot
* USB: fixed occasional VM hangs with SMP guests
* USB: proper device detection on RHEL/OEL/CentOS 5 guests
* ACPI: force the ACPI timer to return monotonic values for improve behavior with SMP Linux guests
* RDP: fixed screen corruption under rare circumstances
* rdesktop-vrdp: updated to version 1.7.0
* OVF: under rare circumstances some data at the end of a VMDK file was not written during export
* Mac OS X hosts: Lion fixes
* Mac OS X hosts: GNOME 3 fix
* Linux hosts: fixed VT-x detection on Linux 3.0 hosts
* Linux hosts: fixed Python 2.7 bindings in the universal Linux binaries
* Windows hosts: fixed leak of thread and process handles
* Windows Additions: fixed bug when determining the extended version of the Guest Additions (4.0.8 regression)
* Solaris Additions: fixed installation to 64-bit Solaris 10u9 guests (4.0.8 regression)
* Linux Additions: RHEL6.1/OL6.1 compile fix
* Linux Additions: fixed a memory leak during VBoxManage guestcontrol execute