Incus - After canonicals takeover of LXD a fork of it called Incus was created. Supporting both virtual machines and linux containers. Free open-source with paid support. https://github.com/lxc/incus
virt-manager - For home usage without clusters and the like a simple Linux host with kvm/qemu/libvirt/virt-manager usually works just fine. https://github.com/virt-manager/virt-manager
Proxmox - KVM/LXC Hypervisor based on Debian. Supports clustering and High-Availability. Free open-source with paid support. https://github.com/proxmox