virtualbox-ose-guest-x11 3.2.8-dfsg-1ubuntu1 (amd64 binary) in ubuntu maverick

 VirtualBox is a free x86 virtualization solution allowing a wide range
 of x86 operating systems such as Windows, DOS, BSD or Linux to run on a
 Linux system.
 .
 This package provides the X11 guest utilities of the Open Source Edition of
 VirtualBox. These utilities are meant to be run inside the virtual machine.
 They provide closer integration and improve the interactive performance.