openfoam.com 4. QuickField Student Edition Best for: Students learning electromagnetic simulation. Platform: Windows. License: Free for non-commercial educational use.

Historical interest or very simple 3D checks.

Motor design, solenoid actuators, magnetic levitation, transformer leakage fields.

Archive.org or university repositories. 6. COMSOL with AC/DC Module (File Demo Mode) Best for: Evaluating commercial-grade solver (limited). Platform: Windows, Linux, macOS. License: Free for viewing/learning (cannot solve your own models).

-- Draw a coil (rectangle with current density) mi_drawrectangle(-10, -5, 10, 5) mi_addblocklabel(0, 0) mi_selectlabel(0, 0) mi_setblockprop("Copper", 0, 1, "Air", 0, 0, 1e6) mi_clearselected()

Classroom exercises, simple electromagnets, motors.

quickfield.com/free_software.htm 5. Ansoft Maxwell SV (Legacy) Best for: Learning basic 3D magnetostatics (older software). Platform: Windows (XP/7 compatibility mode). License: Freeware (no longer supported).

femm.foster-miller.net 2. Elmer FEM (Multi-physics) Best for: Coupled electromagnetic-thermal-structural problems. Platform: Windows, Linux, macOS. License: GPL (open source).