Fort Hoofddijk Software

There are numerous packages for paleomagnetic data analysis. Just a few links:

Program: Excel Spreadsheet
(click on the logo above for zip file)
Performs component analysis on IRM acquisition curves using LAP, GAP and SAP plots

Kruiver, P.P., Dekkers, M.J., and Heslop, D. (2001) Quantification of magnetic coercivity components by the analysis of acquisition curves of isothermal remanent magnetisation, Earth Planet. Sci. Lett., 189, 269-276.

See for the latest web application at the IRM's  MAX UnMIx site