A virtual machine is a computer defined in software. It's like running a PC on your PC.

This free desktop virtualization software application makes it easy to operate any virtual machine created by VMware Workstation, VMware Fusion, VMware Server or VMware ESX.

Key Features Include:

• Run multiple operating systems simultaneously on a single PC.
• Experience the benefits of preconfigured products without any installation or configuration issues.
• Share data between host computer and virtual machine.
• Run both 32 and 64 bit virtual machines.
• Leverage 2-way Virtual SMP.
• Use 3rd-party virtual machines and images.
• Share data between host computer and virtual machine.
• Broad host and guest operating system support.
• Support for USB 2.0 devices.
• Get appliance info at start-up.
• Gain easy access to virtual machines via intuitive home page interface.

VMware Player also supports Microsoft Virtual Server virtual machines or Microsoft Virtual PC virtual machines.