Fabian Winternitz is one of our awesome tools developers, and you can see some of his work in this post. That's a Visual Studio extension that will display searchable diagrams for the model exposed by any service endpoint that exposes OData metadata. Which these days includes a lot of software.
Personally, I think it's great to see on one hand the level of support for the ecosystem, and on the other hand the balance of power, expressiveness and simplicity that OData provides. Back when everything started in the early days of Project "Astoria", I don't think anyone had any idea as to how broad a spectrum of software components would play in this space, but it looks like sticking to simplicity and proven standards paid off.