VirtualBox is traditionally considered to be a virtualization solution aimed
at the desktop as opposed to other solutions such as KVM, Xen and VMWare ESX
which are considered more server oriented solutions. While it is certainly
possible to install VirtualBox on a server, it offers few remote management
features beyond using the vboxmanage command line. RemoteBox aims to fill
this gap by providing a graphical VirtualBox client which is able to
communicate with and manage a VirtualBox server installation.

RemoteBox achieves this by using the vboxwebsrv feature of VirtualBox that
allows its API to be accessed using a protocol called SOAP, even across a
network. RemoteBox is very similar in look and feel to the native VirtualBox
interface and allows you to perform most of the same tasks, including
accessing the display of guests – completely remotely.