List of some most common virtualization Techniques in industry.

Xen (paravirtualization, HVM) -- Supports Windows OS
citrix Xen Server (same as Xen) -- Supports Windows OS
vmWare (Paravirtualization) -- -- Supports Windows OS

OpenVZ (OS Level Virtualization[VE's containers])
-- Does not support Windows OS, But is best for Linux OS because it does not completely install new os but uses kernel of the main OS.

KVM (Kernel Based Virtual Machine) -- Supports Windows OS

Above are given the virtualization techniques which can be used by different platforms to provide better services to ve clients.

SolusVM (Commercial License)Solus Virtual Manager (SolusVM) is a powerful GUI based VPS management system with full OpenVZ, Xen Paravirtualization and Xen HVM support. SolusVM allows you and your clients to manage a VPS cluster with security & ease.

HyperVMs (Free License)
Flexible Virtualization Management System. Control your Server Farm from a single Console. Support for both os level (OpenVZ) and Hardware level (Xen) virtualization.

Proxmox Virtual Environment

Proxmox VE is an easy to use Open Source virtualization platform for running Virtual Appliances and Virtual Machines.
Proxmox VE is an open source project, developed and m