The XQuartz project is an open-source effort to develop a version of the X.Org X Window System that runs on macOS. Together with supporting libraries and applications, it forms the X11.app that Apple shipped with OS X versions 10.5 through 10.7.
Software Title Tags
Software Titles Tagged "Operating System"
Server Operating System
Desktop Operating System
VMware provides cloud computing and virtualization technology including desktop software that runs on Microsoft Windows, Linux, and macOS.
The VMware Academic Software Licensing Program supports the use of virtualization applications in teaching and research. The program provides both desktop and infrastructure software for personal use, whether as part of STEM classes, in research projects, or for gaining hands-on experience with VMware products. Applications are provided at no cost to end users through an annual subscription fee.
Please review available licensing options (educational vs. administrative/commercial) and choose the option that matches your use case.