Comparison of EM simulation software

The following table lists software packages with their own article on Wikipedia that are nominal EM simulators;

Name	License	Windows	Linux	3D	GUI	Convergence detector	Mesher	Algorithm	Area of application
NEC	open source				In some distributions		manual	MoM	Antenna modeling, especially in Amateur Radio. Widely used as the basis for many GUI-based programs on many platforms. Version 2 is open source, but Versions 3 and 4 are commercially licensed.
Momentum	commercial						equidistant	MoM	For passive planar elements development, integrated into Keysight EEsof Advanced Design System.
Ansys HFSS	commercial						Automatic adaptive	FEM, FDTD, PO, Hybrid FEBI, MoM, and Eigenmode expansion.	For antenna/filter/IC packages, Radome, RFIC, MMIC, Antenna Placement, Waveguide, EMI, Frequency selective surfaces, Electromagnetic metamaterials, Composite Material, RCS-Mono and Bi development.
XFdtd	commercial						Automatic	FDTD	RF and microwave antennas, components, and systems, including mobile devices. MRI coils, radar, waveguides, SAR validation.
AWR Axiem	commercial						Automatic, Hybrid	MoM	PCBs, multi-layer PCBs, LTCC, HTCC, on-chip passives, printed antennas. Integrated into Microwave Office.
AWR Analyst	commercial						Automatic and adaptive	FEM	3D structurers, waveguides, 3D filters, PCBs, multi-layer PCBs, LTCC, HTCC, on-chip Passives, printed antennas. Integrated into Microwave Office.
JCMsuite	commercial						Automatic, error-controlled	FEM	Nano- and micro-photonic applications.
QuickField	commercial and free editions						Automatic or Manual	FEM	General purpose for research, engineering and educational use, includes AC, DC and Transient Magnetics, Electrostatics, AC and DC Conduction, Transient Electrics, Heat Transfer and multiphysics
COMSOL Multiphysics	commercial						Automatic	FEM, MoM, BPM, ray tracing	General purpose
FEKO	commercial						Automatic or manual; adaptive	MoM, FEM FDTD MLFMM PO RL-GO UTD	For antenna analysis, antenna placement, windscreen antennas, microstrip circuits, waveguide structures, radomes, EMI, cable coupling, FSS, metamaterials, periodic structures, RFID
Elmer FEM	open source						manual, or can import other mesh formats	FEM	General purpose, includes 2D and 3D magnetics solvers, both static and harmonic. 3D solver is based on the Whitney AV formulation of Maxwell's equations.
VSimEM	Commercial						Automatic, variable mesh	FDTD, PIC, finite volume	Simulating electromagnetics, and electrostatics in complex dielectric and metallic environments. Phased array antenna systems, radar equipment, and photonics.
Meep	open source						manual	FDTD, FDFD	Optics and photonics
CST Studio Suite	commercial						Automatic, adaptive	FDTD/FIT, FEM, MLFMM, MoM, SBR, PIC	General purpose – statics, low-frequency, microwaves and RF, terahertz, photonics, particle accelerators, electronics
MPB	open source						manual	PWEM	For band diagram and modal analysis of periodic structures