Free Windows Server 2012

Windows Server 2012 is a cloud-optimized, highly dynamic, available, and  cost-effective server platform. Download the free Windows Server 2012 trial  to evaluate it for 180 days, with no feature limits.

Experience the next level of Microsoft’s server platform, including new virtualization  and cloud capabilities, enhanced manageability, an exciting new open  application and web platform, and the ability provide access to data and  applications from virtually anywhere on any device. 

 https://technet.microsoft.com/en-US/evalcenter/hh670538.aspx