WARNING: concrete5 5.6 and earlier are end-of-life. Sales from the marketplace have now ended. Click here to learn more about this transition.
GET ANY 2 FOR THE PRICE OF ONE!
Pay for the most expensive and the second theme or add-on is free!
Responsive Image gallery slider is a neat add-on that will resize itself according to your page size. From http://tympanus.net/codrops/2011/09/20/responsive-image-gallery/
Update released allowing user to swap position of thumbs either on top or bottom.