Doctor Who, Game of Thrones, Disney, Harry Potter, Star Wars - they've got items from these television shows and movies and more. They offer a lot of stamped metal items, but the floating lockets are my favorite. You can purchase a few of them already assembled (like the Tenth Doctor one pictured below), but they also sell the pieces so you can build your own. You can choose the background, floating charms, dangles, and the type of metal. Being able to customize jewelry makes shopping for it more addicting (in a good way).
Spiffing Jewelry's collection; they have lots of fun accessories and not just nerdy pieces.
h/t to Katie Doyle for tweeting about the company.