VirtualBox

VirtualBox is an x64 personal computer hypervisor originally created by Innotek GmbH from Germany. Sun Microsystems acquired Innotek in 2008 and was itself acquired by Oracle Corporation in 2010. VirtualBox can be used to run various operating systems in a window without having to install them onto the computer itself.

Originally, it was an x86 computer hypervisor, but with version 6.0 it became x64. The 32-bit version is still supported until July 2020.