If you are familiar with Windows 8 or Pinterest, you know of the dynamic grid layout. A dynamic grid is a layout where you can rearrange and reposition child elements as required or when you have your browser resized. A popular jQuery plugin used to create this layout is jQuery Masonry but if you want more options and even animation, check out FreeWall.
FreeWall is a free jQuery plugin from Minh Nguyen which you can use to create many grid layout types: flexible layout, metro style layout, nested grids, image layout and fluid grid. It also has support for responsive design so you can display your site in desktop, mobile or tablet.