  RESPACK is a first-principles calculation software for evaluating the
interaction parameters of materials and is able to calculate maximally
localized Wannier functions, response functions based on the random phase
approximation and related optical properties, and frequency-dependent
electronic interaction parameters. RESPACK receives its input data from a
band-calculation code using norm-conserving pseudopotentials with plane-wave
basis sets. Automatic generation scripts that convert the band-structure
results to the RESPACK inputs are prepared for xTAPP and Quantum ESPRESSO. An
input file for specifying the RESPACK calculation conditions is designed
pursuing simplicity and is given in the Fortran namelist format. RESPACK
supports hybrid parallelization using OpenMP and MPI and can treat large
systems including a few hundred atoms in the calculation cell.
