Codes pw2bgw.x and bgw2pw.x convert data files from pw.x to a format suitable for usage by the Berkeley GW code, and vice versa. See files Doc/INPUT_pw2bgw.* and Doc/INPUT_bgw2pw.* for input data documentation. NOTE: bgw2pw.x works only with the "old" and no longer supported I/O format.
Code pw2gw.x converts data files from pw.x to a format suitable for usage by another GW code, computes optical properties in single-particle approach (Fermi Golden Rule). See file Doc/INPUT_pw2gw.html for input data documentation, directory pw2gw_example/ for an example of usage.
Code open_grid.x writes Kohn-Sham orbitals for the complete k-point grid (not symetry-independent points only) in real space. Useful for further processing. It can be used to generate the Kohn-Sham state data required in pw2wannier.x and Wannier90 from the initial SCF calculation, bypassing the non-SCF calculation step.
Code pw2critic.x is an interface to the CRITIC2 code by Alberto Otero-de-la-Roza. This program creates a pwc file containing the Kohn-Sham orbitals from an SCF calculation (or from the output of open_grid.x). These orbitals are used for post-processing in CRITIC2.
Code pw_export.f90, no longer compiled by default and obsolete, is an interface to other codes, documented in Doc/INPUT_pw_export.*.