Nice work your editor! Small note, I'd suggest you not hide some of the functionality behind menu (Bring forward, Send backward, ...). There is plenty of space in the upper menu and it might be better if the user saw these buttons directly and be able to manipulate them with one click.

Figurepool is indeed built with Raphael from scratch. I'm also using JointJS though, a diagramming lib that I built some time ago. My goal is to build a mixture of vector graphics and diagramming tool.

You're absolutely right about the "Save & Sign up" button. Will do it soon...