Open-Source-PCB-Ruler

PCB ruler with different foot prints ,SMD proto-typing area, tables, various AWG size holes and inches and cm scale.
CC-BY-SA https://creativecommons.org/licenses/by-sa/3.0/
Suggestions for footprints http://black-electronics.com/blog/open-source-pcb-ruler/

<img src="http://black-electronics.com/blog/wp-content/uploads/2013/11/bottom.png"alt="Bottom" style="width: 600px;">

3D views generated from http://mayhewlabs.com/3dpcb