Dynabrush applies mass and drag in a physics simulation to a calligraphy brush. I brought the PostScript output into Adobe Illustrator for cleanup and adjustment, then printed the final works on canvas.
That same brush is drawing in the background of this whole website. Try DynaDraw and draw with it yourself: set the mass and drag, choose a flat or round nib, and change the ink and paper. Nothing is saved, so you can clear the page and start again.
