Virtualization

Virtualization
Hypervisors or Virtualizers
OS-Level Virtualizers
Emulators

Hypervisors or Virtualizers

Virtualbox
Xen
KVM

OS-Level Virtualizers

Containers - LXC, Docker, Podman, OpenVZ (VPS)
Jails - chroot, BSD Jails

Emulators

QEMU

Note

QEMU can work with KVM to provide CPU and Memory passthrough for native virtualization.

Performance

Virtualbox uses both hardware and software virtualization. It is said to achieve better performance than QEMU, but QEMU/KVM is said to perform better than Virtualbox.