I've wrote a small program to calculate all (complex) roots of the polynomials of the 24th degree, with all coefficients being either +1 or -1, and to draw the result on the complex plane.
The (very impressive in my opinion) result can be seen here:
(Warning! 20000x20000 image, over 40 Mb, I've heard that at least Firefox is incapable of showing it)
Technical details, if you care: the program is in OCaml (my general purpose language of choice), roots calculation is done with help of GSL, drawing is done with Cairo.