tomaszsita/wp-manual-image-crop — pull request #6 by spwarner (2014-03-20 22:31:52+00:00)
Title: Update ManualImageCrop.php

Added generation of @2x (retina) versions of the crop
I suggested this on the support forum, and then decided to try and do it - turned out to be simple enough. To do this properly there should be some sort of setting to enable/disable retina generation - that might need a lot of thought...