VMware Server is a hosted virtualization platform that installs like an application on any existing server hardware and partitions a physical server into multiple virtual machines.

VMware Player is free software that enables PC users to easily run any virtual machine on a Windows or Linux PC.

VirtualBox is a general-purpose full virtualizer for x86 hardware. Targeted at server, desktop and embedded use, it is now the only professional-quality virtualization solution that is also Open Source Software.

Some of the features of VirtualBox are:
Modularity. VirtualBox has an extremely modular design with well-defined internal programming interfaces and a client/server design. This makes it easy to control it from several interfaces at once: for example, you can start a virtual machine in a typical virtual machine GUI and then control that machine from the command line, or possibly remotely. VirtualBox also comes with a full Software Development Kit: even though it is Open Source Software, you don't have to hack the source to write a new interface for VirtualBox.
Virtual machine descriptions in XML. The configuration settings of virtual machines are stored entirely in XML and are independent of the local machines. Virtual machine definitions can therefore easily be ported to other computers.

VirtualBox is a general-purpose full virtualizer for x86 hardware. Targeted at server, desktop and embedded use, it is now the only professional-quality virtualization solution that is also Open Source Software.

Some of the features of VirtualBox are:
Modularity. VirtualBox has an extremely modular design with well-defined internal programming interfaces and a client/server design. This makes it easy to control it from several interfaces at once: for example, you can start a virtual machine in a typical virtual machine GUI and then control that machine from the command line, or possibly remotely. VirtualBox also comes with a full Software Development Kit: even though it is Open Source Software, you don't have to hack the source to write a new interface for VirtualBox.
Virtual machine descriptions in XML. The configuration settings of virtual machines are stored entirely in XML and are independent of the local machines. Virtual machine definitions can therefore easily be ported to other computers.

Virtual Machines are one of those rare technologies that not only make you go 'wow', they make you realize that the game just changed. Virtual Machines allow you to run multiple operating systems in separate windows, similar to an application, simultaneously on your desktop or laptop. Your host system might be Windows 7, but you can boot up a Windows Server 2003 instance in one window and a Linux machine in another window and then network them together!. Virtual Machines make getting hands-on experience with new operating systems and new application upgrades easy, fast and safe for your base computing platform. In this QuickStart course, author Mark Long gives you the basic understanding and resources you need to get a virtual machine up and running on your computer fast!.

Virtual Machines are one of those rare technologies that not only make you go 'wow', they make you realize that the game just changed. Virtual Machines allow you to run multiple operating systems in separate windows, similar to an application, simultaneously on your desktop or laptop. Your host system might be Windows 7, but you can boot up a Windows Server 2003 instance in one window and a Linux machine in another window and then network them together!. Virtual Machines make getting hands-on experience with new operating systems and new application upgrades easy, fast and safe for your base computing platform. In this QuickStart course, author Mark Long gives you the basic understanding and resources you need to get a virtual machine up and running on your computer fast!.

Portable Microsoft Virtual PC 2007 SP1 v6.0.192.0 | 28.35 MB

Windows Virtual PC is the latest Microsoft virtualization technology that allows you to run many productivity applications on a virtual Windows environment, with a single click, directly from a Windows 7-based PC.

Windows Virtual PC has a number of exciting features including:
- Seamless Applications: Launch applications installed on a virtual machine directly from the Windows 7 desktop, as if they were installed on the Windows 7 host.
- Simplified UI: Enhanced UI that is easy to use. Integrated with Windows 7 Explorer.
- Integration Features: Allows clipboard sharing, drive sharing, and printer redirection between Windows 7 and the virtual machine.
- USB support: Users can access USB devices attached to the host, directly from virtual machines. These devices include Printers and Scanners, Flash Memory/Sticks and External Hard Drives, Digital Cameras, and more.