WMAP is distributing the following software packages:
Likelihood Code, consisting of FORTRAN subroutines to compute the
likelihood of an input theoretical power spectrum fit to the WMAP
power spectra, using the correct Fisher matrix. Download Further details
Skymap I/O Code, consisting of FORTRAN and IDL routines to read the
the combined IQUS FITS format used in the second WMAP data release. Download README