Makyo lets you copy virtual machines and vApps from one vCenter Server to another using a wizard in the vSphere Web Client. The said copy operation from one vCenter Server to another is done by starting an OVF export operation on the source server and an import OVF operation on the target server. No intermediate files are created when you copy a virtual machine or a vApp. The fling is installed as a plugin to the vSphere Web Client.