How we tested the best virtual machine software Although there are some wonderful open source options out there, free and budget software options can sometimes prove limited when it comes to the variety of tools available, while higher-end software can really cater for every need, so do ensure you have a good idea of which features you think you may require. When deciding which virtual machine software to download and use, first consider what your actual needs are. Which virtual machine software is best for you?

We've featured the best laptops for programming. Read our full Microsoft Hyper-V review (opens in new tab). Hyper-V allows relatively inexperienced users to create a virtual server environment, but don’t expect miracles. Although driver support for Linux isn’t great, and there is no virtual GPU support. The guest OS support includes Windows Server, Windows XP SP3 or later, Linux with a 3.4 or better Kernel and FreeBSD. However, what you get for nothing is a very basic hypervisor that can’t do the clever things that VMware offers. These days it comes as part of Windows 10 Pro and Windows Server (20), at no additional cost to the user. Originally codenamed Viridian, and then Windows Server Virtualization, it was rebranded to Hyper-V Server when it was first released in late 2008.

Read our full Xen Project review (opens in new tab). A key emphasis is on security by using as small a code base as possible, making it not just secure but especially flexible. The service is especially applicable for hyperscale clouds, and can easily be used with AWS, Azure, Rackspace, IBM Softlayer, and Oracle. The Xen Project software is even being used in automotive and aviation systems.

This includes but is not restricted to Infrastructure as a Service (IaaS) applications, desktop virtualization, and security virtualized. It is especially used for advanced virtualization, not least for servers, in both commercial and open source environments. The Xen Project now works with The Linux Foundation in promoting open source applications. Originally developed by Cambridge University, the staff who created it spun it into a company that was later acquired by Citrix. Xen Project is a free and open source virtual machine monitor (VMM), intended to serve as a type-1 hyperviser for multiple operating systems using the same hardware.

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