OpenXT is “an open-source development toolkit for hardware-assisted security research and appliance integration,” and was started by a team at Citrix.
The project is a massive systems project (basically an entire OS for PCs). The project includes a full-screen single page application created with Dojo to create virtual machines and manage the platform. It uses a custom data access layer which communicates with the system DBUS control plane via WebSockets.
Here are a few screenshots of the application: