New tool virt-xml: Edit libvirt XML in one shot from the command line
Improved defaults: qcow2, USB2, host CPU model, guest agent channel
Introspect command line options like --disk=? or --network=help
Virtual Machine Manager provides a graphical tool for administering virtual machines for KVM, Xen, and LXC. Start, stop, add or remove virtual devices, connect to a graphical or serial console, and see resource usage statistics for existing VMs on local or remote machines. Uses libvirt as the backend management API.