Oracle virtual box

Oracle VM VirtualBox is a free and open-source hosted hypervisor for x86 virtualization, developed by Oracle Corporation. Created by Innotek, it was acquired by Sun Microsystems in 2008, which was in turn acquired by Oracle in 2010. VirtualBox may be installed on Windows, macOS, Linux, Solaris and OpenSolaris. 

Basically it's a free and open-source software developed by Oracle. This software is helpful if the user want to run another operating system on his PC or laptop without deleting the old one or dual boot. You can find its tutorial on YouTube and can find how it works. 

Oracle virtual box can be downloaded on any operating system windows, Linux and macos.If you want to try another operating system before you install it on your original device you can run it on virtual box.