When Daniel J. Bernstein made his DAGs of standard crypto algorithms (http://cr.yp.to/cipherdag/cipherdag-20070630.pdf http://cr.yp.to/cipherdag/cipherdag-20070

When Daniel J. Bernstein made his DAGs of standard crypto algorithms (http://cr.yp.to/cipherdag/cipherdag-20070630.pdf http://cr.yp.to/cipherdag/cipherdag-20070630.pdf) he mentioned that they'd crashed every standard drawing tool he tried. He makes a reference to "...my own drawing tools, which are much more careful in their use of memory." Unfortunately, I'm not sure where to obtain DJB's drawing tools.