Java Expression Parser(JEP)
JEP is the excellent library which FofZ makes use of to parse it's mathematical expressions. Get it here: http://jep.sf.net
Java OpenGL (JOGL)
Java has had a few attempts at hardware accelerated 3D rendering. This I find to be the best so far. JOGL allows you to use standard OpenGL code within your Java program. Get it here: http://jogl.dev.java.net
f(z)
f(z) was the program that inspired me to write FofZ. My dad showed it to me when I was first learning about complex numbers and it made them fascinating to me. Sadly the programs interface often left my frustrated and so I decided that once I know enough I would write my own version. It's still and excellent piece of software and you can get a cutdown demo version for free at: http://www.lascauxsoftware.com/