VirtualBox is a general purpose virtualizer for x86 hardware for server, desktop and embedded use.
The Oracle announce the release of VirtualBox 4.0.8. This version introduced many bug fixes carried with 3D support for GNOME3. The release fixes a potential crash when resizing the guest window.It also support GNOME3 under Ubuntu 11.04 and Fedora 15.
Note that Oracle acquired VirtualBox from Sun Microsystem.