oVirt is an opensource server and desktop virtualization management system
oVirt is a virtualization management (SVI/VDI) application. That means that you can use the oVirt management interface (the oVirt engine) to manage hardware nodes, storage and network resources, and to deploy and monitor virtual machines running in your data center. oVirt uses KVM as the hypervisor.
oVirt serves as the upstream for Red Hat's Enterprise Virtualization. This is where new features are developed before being incorporated into RHEV.