FonSinEM is Freeware based on the FDTD method.

• Link (29 Feb 2016)

GMES is a free Python package for FDTD electromagnetic simulations.

• Link (23 Sep 2013)

gprMax3D

Ground Penetrating Radar (GPR) is a non-destructive electromagnetic investigative tool used in many diverse applications across the fields of engineering and geophysics.

• Link (10 Aug 2015)

B-CALM or Belgium California Light Machine is a fast 3D GPU-based Finite-Difference Time-Domain simulation tool for electromagnetic simulations.

• Link (30 Oct 2012)

MAXDGTD by Hassan Fahs is a discontinuous Galerkin code for solving Maxwell's equations in the time-domain (DGTD). It is a Fortran code.

• Link (31 Jul 2015)

Angora by Ilker R. Capoglu is a free, open-source software package that computes numerical solutions to electromagnetic radiation and scattering problems. It is based on the finite-difference time-domain (FDTD) method.

• Link (23 Oct 2012)

Overture is an Object-Oriented Toolkit for Solving Partial Differential Equations in Complex Geometry. It includes Cgmx, an Electromagnetics Solver.

• Link (7 March 2014)

Electromagnetic Template Library (EMTL) is a free C++ program for electromagnetic simulations. The current version of the program is designed for quick and efficient programming of FDTD simulations and for extending the available FDTD algorithms with new techniques and features.

• Link (18 Oct 2012)

GSvit - open source software FDTD solver with graphics card computing support by Petr Klapetek.

• Link (23 Jan 2014)

openEMS is a free and open electromagnetic field solver using the FDTD method. Matlab or Octave are used as an easy and flexible scripting interface.

• Link (16 Oct 2012)