Swapping Wall (PAID)
This extension implements a responsive image gallery that automatically and randomly swaps images. The gallery can be used in responsive layouts (with breakpoints) or inside a layout grid for full width/flexible layouts. Clicking one of the images opens a lightbox gallery, where a larger version of the image can be displayed.
Discount: Gallery Extensions Pack - Volume 2
This extension is also part of the Gallery Extensions Pack 2 which includes 11 gallery / slideshow extensions for only $19.95!