River from Greek mythology, separating the world of the living from Hades, the world of the dead. Ferrying the souls of the dead across Styx is Charon, the ferryman, whose pay is the two coins placed on the eyes of the dead before burial.

Also a UNIX/networking/design consultancy agency in Mexico City, employing people of many nationalities, including Mexican, French, Russian, merkin, and Norwegian. Styx runs a geek house where many of the employees live and work.