The program "FandP" (Fields and Potentials) written for the Amiga and Microsoft Windows provides stereoscopic views of electric potentials and corresponding electric fields for configurations of 1 through 8 charges.  As with "Crystal Lattices", the views can be rotated and zoomed in real time.  This program is still under development, but beta testers are being sought.
A few sample images are given below.
You will need a pair of red and blue 3D glasses to view them.
Electric Field for a Quadrupole 
Surface Plot of Potential for Same Quadrupole

You will find the program interesting if you are a science educator, or just interested in 3D animations.

If you are interested in beta testing the Window version of this software, you can download  FandP32.zip    here.  This version requires a 32 bit version of the operating system such as Windows 95, Windows NT 4.0, and Windows 3.x with Win32s installed.

A 16 bit version will be made available in the near future in case you don't have access to a 32 computer.  This version will have reduced capabilities, but will run even on computers that emulate Windows with 16 bit capability.

An Amiga version will also be released in the near future.