This is probably the first thing you'll see of Xen Orchestra. It's the Web interface, allowing to interact with your virtual infrastructure. As a module for XO-web, it facilitates the everyday Xen administrator work, but also provide a solution to delegate some part of your infrastructure to other people.
Read the features section to discover what you can do in XO-web.
We stay consistent from the back-end to the front-end with one main language: ReactJS