Responsive Gallery Grid is a WordPress plugin by Jules Colle that changes the native WordPress gallery to a gallery that nicely fits your images into a jigsaw-like grid. Much like the Google+ gallery.
The gallery will fit in nicely in a responsive web design, as the grid is recalculated when scaling the window.
By default the images will pop out a whenever you move the cursor over them. The z-indexes are updating so that the pop-out images are always on top.
The animation speed, scaling, margins and max row height will be customized in the next version of Responsive Gallery Grid.