VirtualBox (VB) is a free and open-source software that provides a virtual machine (VM) for a variety of guest operating systems. Detailed installation instructions can be found in the VirtualBox User Manual. VB, by default, saves its VM in the VirtualBox image (VBI, file extension:
.vdi) file format. The software is currently owned by Oracle.
For USB and RDP support, a non-open source (licensed under PUEL) extension pack needs to be installed.