VirtualBox 4.0.16.75491 free download Linux, Mac, Windows

VirtualBox è un software di virtualizzazione distribuito secondo i termini della GNU General Public License, per architettura x86 che supporta Windows, GNU/Linux e Mac OS X come sistemi operativi host, ed è in grado di eseguire Windows, GNU/Linux, OS/2 Warp, OpenBSD e FreeBSD come sistemi operativi guest.

Changelog:
# The following items were fixed and/or added:
* VRDP: fixed screen corruption
* VRDP: fixed screen freeze
* ATA: fixed a possible crash during ATAPI passthrough with certain guests
* NAT: the interface stopped working after a lot of failed ICMP requests (bug #9371)
* Metrics: fixed potential problem with invalid access in guest metrics collection upon VM destruction
* Main: fixed incorrect framebuffer information after leaving the fullscreen mode with X11 guests, this lead to a scrambled preview window in the GUI for example
* VBoxSVC: fixed crash under rare circumstances (e.g. client crash)
* VMDK/VHD: fixed a possible corruption with host cache disabled when using snapshots under rare circumstances (bug #9749)
* OVF/OVA: fixed broken disk images on import under rare circumstances
* Mac OS X hosts: fixed the problem with duplicate packets when bridged to wireless interface (bug #9648)
* Windows Additions: implemented faster detection of logged-in guest users and stale sessions
* Linux guests: fixes for Linux 3.2


DOWNLOAD =>>>> http://www.virtualbox.org/wiki/Downloads