PCBmodE is a PCB design tool built sort of like a programming language. Instead of laying out a board graphically, you write a JSON description, which PCBmodE then compiles into an SVG. You can preview and even edit the layout in Inkscape, then use PCBmodE again to generate Gerber/Excellon files you can send to the fab house.
This seems like it could be a clever end-run around the complexity and generally proprietary nature of EDA tools. Using Inkscape as a viewer/graphical editor instead of writing a whole new CAD app is a great idea.