Hello!
I thought I'd share my project as well since I recently made its development public!

It's still in heavy development and doesn't even fully utilize BEPUPhysics yet, but it's been already crucial to its function, since it wouldn't be possible to interact with the environment without a physics engine and BEPU makes everything simpler because it's so neatly written, fast and platform independent :3
It's called NeosVR and I describe it as a "world engine". It has a generic synchronization engine at its core, which allows building multiplayer VR experiences in VR... and in multiplayer

It creates an abstraction layer on top of a game engine which ensures everything stays in sync and developers (and users) can treat the world/scene as a single instance in most cases, focusing just on whatever they are building.
Here's a quick sneak preview of some testing stuff built on top of that:
https://www.youtube.com/watch?v=9fgDjhHdfUs
Here's more recent entry, shows particle systems with collisions (using BEPU for raycasts of course!):
https://www.youtube.com/watch?v=orIjC6wDh5Y