ReFlex Gallery is an easy to use responsive WordPress Photo Gallery Plugin that is two gallery plugins in one.
Represent an entire gallery as a thumbnail - grouped like albums
PrettyPhoto style pop-up for image gallery
Dynamically switch to slider for mobile devices (480 pixels or less)
Gallery Overview admin panel - easily maintain multiple galleries
Add galleries to group images into
Add images by first selecting which gallery to add image into
Add images (multiple image upload is a pro feature)