Magnetic field modeling software?

[amblybiguity]

Does anyone know a good program, even a demo for modelling how magnetic fields influence each other?

I'd like to run thru some exercises with actual numbers on wjhat kind of field patterns can be made by arranging magnets of same or different strength in different configurations.

I should clarify that I want to model permanent magnets in 3d space. Also, I'm hoping to hear from people who have used said software if possible.

 

[Khashishi]

Magnetic fields don't influence each other. They simply overlap. (c.f. superposition principle). If you want the field of two permanent magnets just add the field of one magnet to the field of the other.