For code relating to the paper "A general basis set algorithm for galactic haloes and discs", see the basis subdirectory.
For code relating to the paper "Adapted resolutions of the Coulomb operator for Slater, Gaussian and B-function orbitals", see the Coulomb subdirectory.
For code relating to the paper "Basis sets and Coulomb resolutions in rotational coordinate systems", see the Rotational subdirectory.
To help check correctness of expressions used in FEM molecular work, there is the fem subdirectory; the corresponding code is at ejlilley/HelFEM (a fork of the original HelFEM).