sprott-decoder
Sprott Decoder (interprets Sprott codes and produces images of attractors)
When compiled, executables generated from syzygy.c and syllegy.c are capable of correctly parsing the codes in J. Clint Sprott's book
Strange Attractors: Creating Patterns in Chaos http://sprott.physics.wisc.edu/sa.htm
which is freely available online.
And generating pnm images from them.
Examples here: http://owen.maresh.info/sprott