The library presented here allows the efficient calculation of friction and mobility matrices that describe the hydrodynamic interactions between identical spherical particles suspended in a liquid, assuming stick boundary conditions on the particle surfaces. It allows an arbitrary mixture of fixed particles, freely moving particles, and freely moving rigid clusters of particles. A special option is provided to calculate the velocities of the particles in a Stokesian dynamics simulation. The particle configuration can be treated as finite in an infinite liquid or as periodic. Four levels of accuracy are available. The library can be used to study colloidal suspensions or macromolecules in solution.