XenServer is FREE available, but the fully supported version can also be purchased.

Citrix has seen the mistake since then and the source code has reopened. But Citrix then took the mistake of trying too hard to take advantage of XenSource, losing many of its main backers. XenServer is a common virtual machine open-source software which Citrix has acquired. And I can tell from my experience it is a versatile solution for virtual machines to be managed on a desktop with too many features to mention. VMware Workstation also communicates with the vSphere using an API. It also enables projects to be saved and cloned. It works well, for example, for developers in the same virtual space, who need database, web, and application servers. This software is designed for advanced users who need several systems to operate. VMware Workstation is a comprehensive and certified virtual machine program. And most operating systems run on 32 and 64bit, as a VM. This FREEWARE permits the creation of new virtual machines from ISO or importation, as opposed to VM Player. VirtualBox mounts Windows, OS X, Solaris, and Linux for laboratory testing and desktop running. Virtualbox VM from Oracle is another cool FREE virtual machine program that is designed for a VMware workstation alternative. Web development, programming languages, Software testing & others 1.

Vm ware free