Template-based system for hanging pictures
Looking for the perfect arrangement of pictures? It's quite possible that The Picturewall Company has a solution. Using a template-based system along with an assortment of frames, they allow you to arrange the frames to make a perfect, well, arrangement. The template system is easy to use and offers you the ability to preview the arrangement before you commit your hooks to the wall.
Link: Picturewall Company [Thanks, Erich]
