OpenVZ forum OpenVZ is container-based virtualization for Linux. KVM forum Kernel-based Virtual Machine (KVM) is a Linux kernel virtualization infrastructure. libvirt forum VServer forum For the discussion of information relating to the use and development of Linux kernel-based virtual servers running on a single piece of hardware. This particular virtual server model is implemented through a combination of 'security contexts', segmented routing, chroot, extended quotas and some other standard tools. Hyper-V Microsoft Hyper-V, codenamed Viridian, formerly known as Windows Server Virtualization, is a hypervisor-based virtualization system for x64 systems. VMware Server forum VMware Server (formerly GSX Server) is an entry-level server virtualization software suite from VMware, Inc., a subsidiary of EMC Corporation. VMware released version 1.0 of Server on July 12, 2006. Server is a continuation of the retired GSX Server product line. VMware Server can create, edit, and play virtual machines. It uses a client-server model, allowing remote access to virtual machines, at the cost of some graphical performance (and 3D support). In addition to the ability to run virtual machines created by other VMware products, it can also run virtual machines created by Microsoft Virtual PC. Users of VMware Server's internal utilities can preserve (and revert to) a single snapshot copy of each separate virtual machine within their VMware Server environment. The product does not have a specific interface for cloning virtual machines, unlike VMware Workstation. VirtualBox forum VirtualBox is an x86 virtualization software package, originally created by German software company innotek, now developed by Sun Microsystems as part of its Sun xVM virtualization platform. It is installed on an existing host operating system; within this application, additional operating systems, each known as a Guest OS, can be loaded and run, each with its own virtual environment. Supported host operating systems include Linux, Mac OS X, OS/2 Warp, Windows XP or Vista, and Solaris, while supported guest operating systems include FreeBSD, Linux, OpenBSD, OS/2 Warp, Windows and Solaris. According to a 2007 survey by DesktopLinux.com, VirtualBox is the third most popular software package for running Windows programs on Linux desktops.