Proxmox VE - Proxmox is an open-source server virtualization management solution that offers the ability to manage virtual server technology with the Linux OpenVZ and KVM technology.
flexVDI - The Open Full-Stack VDI Solution
Hyper-V - Install Hyper-V on Windows 10
QVD Virtual Desktop - QVD Virtual Desktop provides an alternative to desktop and applications virtualisation under Linux environment; VDI secure, flexible and affordable
Azure Virtual Machines - Build Linux and Windows virtual machines (VMs) and save up to 80 percent with Azure Reserved Virtual Machine Instances and Azure Hybrid Benefit for Windows Server.
IsardVDI - Open Source VDI deployment based on KVM linux virtualization and dockers.