I'm impressed nobody mentioned libvirt (https://libvirt.org/ https://libvirt.org/) here, an open source framework for managing all kind of virtualization platfo

I'm impressed nobody mentioned libvirt (https://libvirt.org/ https://libvirt.org/) here, an open source framework for managing all kind of virtualization platforms. It is especially well suited to take off all heavy work of managing QEMU. From the features, Virt-Manager (https://virt-manager.org/ https://virt-manager.org/) can compete with VirtualBox -- and is probably well beyond, thanks to network transparency, the Spice protocol, real guest console access, powerful CLI interfaces such as `virsh` and other goodies. In Linux distributions, you basically install `virt-manager` and the package manager will resolve all dependencies to provide you a fully working virtualization desktop software which is well capable to be used on servers.