XNC A breath of fresh air
Ucamco, KiCad and Pentalogix have developed XNC, a format for PCB drill data, with the support of Graphicode, Cuprum and ZofzPCB. XNC is a strict subset of the ubiquitous NC or Excellon data. Freely available and simple to implement, XNC takes all the confusion out of CAD software development and the CAD-CAM drill data exchange process.