Does anyone know any efficient Julia set graphing programs for exponentiation?

[JmsNxn]

I think the title speaks for itself. I've been using rudimentary visualizations to understand the Julia set of various exponentials; and I'd like to have access to some sort of pari-gp protocols.

I'm just hoping someone has any idea. I might ask this on stackoverflow, if no one knows any off hand.

Regards, James