Looking for recommendations for 2D (or 3D) electric field mapping software. I want to be able to populate a series of electrodes in a plane and understand the equipotentials present when these electrodes are driven to different voltages. Would like to model virtually first before realizing the design in a PCB/PWB to reduce cycle time. Must be low cost or FOSS software. Will be modelling fields in free-space and with patterns of electrodes, so no fancy lossy di-electrics or esoteric material need be supported.
QuickField Student edition - 2D finite element package - Windows
Trace Analyzer - Transmission line parameter calculator for PCB's - Win/Mac/Linux
SATE - Static Field Analysis Toolkit - 2D E-Field - Windows
Radia - 3D Static magnetic fields - Mathematica plugin
PDN Mesh - 2D field problems (Poisson and Helmholtz Equations). - Windows
OpenEMS - open electromagnetic field solver using the FDTD method. Matlab or Octave are used as an easy and flexible scripting interface. - Win/Linux
NEC2 - (Method of Moments) simulates the electromagnetic response of antennas and metal structures. - Win?linux
MMP - The Multiple Multipole Program (MMP) - Win/Unix
MEEP - Meep (or MEEP) is a free finite-difference time-domain (FDTD) simulation software package developed at MIT to model electromagnetic systems. - Win/Linux
LC - LC is simulation tool for the analysis of the electromagnetic properties of electrical interconnects. - Linux/Unix compile
EM Explorer - EM Explorer is a 3D electromagnetic (EM) solver for scattering problems of periodic structures illuminated by arbitrary incident fields including planewaves, Gaussian beams and focused Hi-NA beams - Windows
Atribution: Blurbs copied from respective web sites.