I know the Pi schematic is available in pdf but my question is the Pi schematic available for any electronic cad software like Eagle?
Given the pictures and schematic in the PDF files and the complexity of the PCB board this was not likely drawn in Eagle CAD.
The blog suggests that the design was using Mentor Graphics Expedition software. Not free, quite professional.
This thread might shed some more light.
There are some designs for the physical dimensions including Sketchup 3D, Wavefront.obj and 3D-Studio.3d, for more read here.