POWMES is a F90 program to measure very accurately the power spectrum in a N-body simulation, using Taylor expansion of some order on the cosine and sine transforms. It can read GADGET format and requires FFTW2 to be installed.

MasQU extracts polarization information in the CMB by reducing contamination from so-called "ambiguous modes" on a masked sky, which contain leakage from the larger E-mode signal and utilizing derivative operators on the real-space Stokes Q and U parameters. In particular, the package can perform finite differences on masked, irregular grids and is applied to a semi-regular spherical pixellization, the HEALPix grid. The formalism reduces to the known finite-difference solutions in the case of a regular grid. On a masked sphere, the software represents a considerable reduction in B-mode noise from limited sky coverage.