Top Alternatives to Microsoft Hyper-V Server

VirtulaBox is an open source software to run virtual systems on top of a physical system. Virtual systems are normally used for providing separate environment for each client sharing a single physical system.

VMware Workstation is a hosted hypervisor that runs on x64 versions of Windows and Linux operating systems.

Xen Project is a hypervisor using a microkernel design, providing services that allow multiple computer operating systems to execute on the same computer hardware concurrently.

Proxmox VE is an open-source server virtualization management solution based on KVM and Linux Containers (LXC).

OpenStack is a free and open-source software platform for cloud computing, mostly deployed as infrastructure-as-a-service (IaaS), whereby virtual servers and other resources are made available to customers.

virt-manager, is a desktop-driven virtual machine manager with which users can manage virtual machines.

Portable-VirtualBox is a free and open source software tool that lets you run any operating system from a usb stick without separate installation.

clearVM is a private cloud management solution.

Citrix XenServer is the leading open source virtualization platform.

Kubernetes ("K8s") is an open-source system for automating deployment, scaling and management.

Apache Mesos is an open-source project to manage computer clusters.

ASG-Remote Desktop integrates a large variety of connection protocols, allowing you to manage Windows, Citrix, Linux/UNIX- and Macintosh systems remotely.

oVirt is free, open-source virtualization management platform.

unRAID Server is a partition management software.