Photonic is a package for the calculation of optical properties of metamaterials, photonic and plasmonic materials. It is written in the PERL language, using the Perl Data Language PDL numerical extension and the Moose object system. Version 0.021 has just been released and is available at github and at cpan. An example of its use can be read here: macroscopic response of a triangular and a honeycomb lattice of metallic nanowires.