Few links to useful programs: 

FORC analysis (First Order Reversal Curves): Freeware program that calculates first order reversal curve (FORC) diagrams from raw FORC data files

LLG Micromagnetics Simulator:  full 3-dimensional simulation tool with integrated graphics that solves the Landau-Liftshitz-Gilbert-Langevin equations (with spin-torques) by relaxation and/or integration

Magnetism@home: Magnetism@home is a research project that uses Internet-connected computers to explore the equlibrium, metastable and transient magnetization patterns (first and foremost in nano-scale 

magpar:static and dynamic micromagnetic problems including uniaxial anisotropy, exchange, magnetostatic interactions and external fields

OOMMF: extensible public domain programs and tools for micromagnetics