Xvisor® is an open-source type-1 hypervisor, which aims at providing a monolithic, light-weight, portable, and flexible virtualization solution.
Multipass Alternatives
Multipass is described as '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' and is an app in the network & admin category. There are more than 50 alternatives to Multipass for a variety of platforms, including Linux, Windows, Mac, BSD and Web-based apps. The best Multipass alternative is VirtualBox, which is both free and Open Source. Other great apps like Multipass are WinBoat, QEMU, VMware Workstation Pro and Proxmox Virtual Environment.