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

Website: https://openEMS.de
Documentation: https://docs.openEMS.de
Github: https://github.com/thliebig/openEMS-Project

openEMS Features:

• fully 3D Cartesian and cylindrical coordinates graded mesh.
• Multi-threading, SIMD (SSE) and MPI support for high speed FDTD.
• Octave/Matlab and Pyhon-Interface
• Dispersive material (Drude/Lorentz/Debye type)
• Field dumps in time and frequency domain as vtk or hdf5 file format
• Flexible post-processing routines in Octave/Matlab and Python
• and many more

Install Instruction

https://docs.openems.de/install.html