All mentioned above are well known and quite enough to simulate the propagation of the EM waves. I would recommend to start with HFSS or CST Microwave Studio Suite. I find these two user friendly. Moreover these programs are highly compatible with each other so it's convinient to switch between them.
Comsol Multiphysics is also very powerfull. But I think it is good one when we need to solve some multiphysical task including electrodynamics.