I find this to be a very cool NURBS-based CAD project, can't wait to play with it more. From what I can see it borrows a lot of concepts from solid modeling CAD tools like Solidworks, but also has UX similarities to other common surface modeling tools like Blender. Here is a video of how it works:
Plasticity - Fresh NURBS Modeler for Everyone! https://www.youtube.com/watch?v=l16YkZnT5zM