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.
Some interesting parts of the big picture: