Virtualization Players and Leadership

Leading Players:

• Citrix (Application | Hardware Virtualization)
• Microsoft (Application | Hardware Virtualization)
• Parallels (OS | Hardware Virtualization)
• VMware (Application | Hardware Virtualization)
• Red Hat (Hardware Virtualization)
• Oracle (OS | Hardware Virtualization)

Additional players: virtualization.info Virtualization Industry Radar

Leadership:

• Gartner Magic Quadrant for x86 Server Virtualization Infrastructure

Open Source Alternatives:

• KVM (Hardware Virtualization - part of Linux Kernel since version 2.6.20)
• OpenVZ (OS Virtualization)
• Xen (Hardware Virtualization)