VMware vSphere Hypervisor ( based on ESXi ) is a free bare-metal hypervisor that virtualizes servers so you can consolidate your applications on less hardware.
bhyve (pronounced "bee hive", formerly written as BHyVe) is a type-2 hypervisor that runs FreeBSD 9+, OpenBSD, Linux and MS Window desktop (versions Vista, 7, 8/8.1/8.2 and 10), as well as MS Windows Server (versions 2008/2008R2, 2012/2012R2 and 2016 Technical Preview...
UTM is a full featured system emulator and virtual machine host for iOS and macOS. It is based off of QEMU. In short, it allows you to run Windows, Linux, and more on your Mac, iPhone, and iPad.
(formerly XenServer) Citrix Hypervisor is a leading virtualization management platform optimized for application, desktop and server virtualization infrastructures.
Qemu Manager is an easy to use management tool for the open-source QEMU emulator. It has a wealth of features for creating, managing and running multiple virtual machines.Discontinued
The official website is no longer available. Last version, 7.0, released in April 2010, can be still downloaded from Download.com
Bochs is a highly portable open source IA-32 (x86) PC emulator written in C++, that runs on most popular platforms. It includes emulation of the Intel x86 CPU, common I/O devices, and a custom BIOS. Currently, Bochs can be compiled to emulate a 386, 486...
The Virtual Environment for secured and comfortable Web Browsing: On the basis of a “Browser-in-the-Box” concept a virtual machine is provided with a reduced operating system and a web browser encapsulated therein.
Multipass is a lightweight VM manager for Linux, Windows and macOS. It's designed for developers who want a fresh Ubuntu environment with a single command. It uses KVM on Linux, Hyper-V on Windows and HyperKit on macOS to run the VM with minimal overhead.