Miscellaneous Useful Information

Here is a table of useful conversions in EPR spectroscopy, originated by Dr. Andrew Ozarowski, NHMFL.
Numbers_Useful_in_EPR

Here is a spreadsheet for calculating diamagnetic susceptibilities.
diamagnetic correction calculator

The related article by Gordon A. Bain and John F. Berry in J. Chem. Educ. is highly recommended: https://pubs.acs.org/doi/abs/10.1021/ed085p532

Here is information on magnetic dipole coupling, wherein the units are confusing.
Units_for_magnetic-dipole_interactions

Here is a chart on magnetic units:
MagneticUnitsChart

Here is a spreadsheet for magnetic moments of various d and f block free-ions.
Magnetic_moments

Here is a spreadsheet for calculating spin projections for various ions. The complete listing is given in a wonderful review article by Roman Boča: Coord. Chem. Rev. 2004, 248, 757–815; see Table 14.
Boca_SAB

Here is a table of analytical solutions, such as they are, for spin Hamiltonian matrices of S = 1/2 to S = 5/2. These were generated using Mathematica®.
Spin_Hamiltonian_Matrices-g,D,E-equations

Here is a spreadsheet of spin-orbit coupling constants and Racah parameters, based on papers by Jesper Bendix and others in the Copenhagen University group and further investigation by me.
SOC_zeta_&_Racah_values_Bendix