Which Airfoil Program do you use to plot airfoils...

Profilii or google selig and get the univ of il. site with all the airfoils by selig and some others.

CompuFoil for me. A little pricey but worth every penny.

Profili.

Compufoil, recently upgraded to CF 3D. Love it.

MJD

Profili II

Compufoil 3D. Lots of features and a short learning curve.

Tile Print, of course.

AutoCAD. I get the coordinates and draw them out.

Profili II. Partway through the "printing" procedure there's a DXF export button. I hit that and poke the DXF into my CAD plan. Or if it's just a "winging it" (GROAN) sort of build I'll just print the section onto paper