OpenCart v.1.5.6.5_rc default combined with a responsive Flat Admin Extension. This Version still uses the non-responsive Default OC Frond Side Theme.
ducquyen/OpenCart-1.5.6.5_rc-Flat-Admin-responsive
Opencart 1.5.6.5_rc Default Theme, with Vqmod and Responsive Flat-Admin Environment. Some responsive Themes exist as Install Files.
PHP