Meep (or MEEP) is a free finite-difference time-domain (FDTD)
simulation software package developed at MIT to model electromagnetic
systems. You can download Meep and learn more about it at the Meep
home page:
http://ab-initio.mit.edu/meep/
The Meep home page also links to a meep-discuss mailing list for
discussions about Meep and FDTD simulations, and a meep-announce
mailing list for announcements of Meep releases.
"MEEP" stands for:
MIT Electromagnetic Equation Propagation
or (add your own below):
Maxwell's Equations for Every Person
MEEP Excites Engineers and Physicists
Maybe Electromagnetism Eventually Pays?
Many Eggheads Earn Prestige