Here’s the (sadly) only decent picture of legoswami’s Hammerhead. It is a ship from an anime called Cowboy Bebob. I haven’t seen the anime myself (to be honest, I haven’t seen any anime), but this is a nice piece of work regardless. Too bad the arm is unable to move.
It is modeled in a family of lego cad-programs. If you want to know more (it is a great way to build without using bricks!), a good place to start is ldraw.org.