OpenVMM is a modular, cross-platform, general-purpose Virtual Machine Monitor (VMM), written in Rust.

• OpenVMM @ GitHub.

This project is a port of the Proxmox Hypervisor on NixOS.

bhyve, the "BSD hypervisor", pronounced "beehive" is a hypervisor/virtual machine manager available on FreeBSD and illumos.

• From Cloud Chaos to FreeBSD Efficiency @ IT Notes.

Qemu/LXC hypervisor in python.

• Hype² @ GitHub.

Converged Container and Virtual Machine Hypervisor.

SmartOS, with its remarkable blend of the illumos kernel's power and the agility of a lightweight OS, has become the preferred choice for many specialized applications. While it shines as a standalone system, its capabilities are truly amplified when used with Triton Compute.

• SmartOS Documentation.
• SmartOS @ GitHub.

Web Interface for XenServer.
Turnkey solution for XenServer and XCP-ng
XOA - your virtual appliance ready in a minute.
GitHub: https://github.com/vatesfr/xen-orchestra

XCP-ng is a virtualization platform based on Xen Source and Citrix® Hypervisor (formerly XenServer). XCP-ng stands for Xen Cloud Platform - New Generation and is a tribute to the old Open Source project XCP, which was abandoned when XenServer was open-sourced in 2013.

XenServer Based, Community Powered. Turnkey Open Source Hypervisor.
Based on XenServer, XCP-ng is the result of massive cooperation between individuals and companies, to deliver a product without limits. No restrictions on features and every bit available on GitHub!

• XCP-ng - A More Professional Alternative to Proxmox Based on Xen @ gyptazy.ch.