BitVisor is a tiny hypervisor initially designed for mediating I/O access from a single guest OS. Its implementation is mature enough to run Windows and Linux, and can be used as a generic platform for various research and development projects.
Luvalley is a lightweight type-1 Virtual Machine Monitor (VMM) with novel architecture, to enable any OS to host virtual machines as pure applications by utilizing hardware virtualization extensions such as Intel VT and AMD-V.