Ryan O’Hara writes in about BoxMaker, a postcardware app for making boxes. From the site:
BoxMaker is a little Java application that can generate the outlines for a box to be out of some material with a cutting device (ideally using wood/acrylic on a lasercutter!). You tell it the dimensions of the box (width, height, depth, material width), and it generates a PostScript file with the outlines for the 6 sides of the box. The dimensions are the outside lengths of the box.
Postcardware means the app is free, but you send them a postcard from where you live. How’s that for site metrics!