From PhiPoint Solutions:
PhiMatrix is a graphic analysis and design tool that lets you see and apply nature's Golden Ratio (Phi, 1.618) and other proportions to any image or layout. It overlays any other program with a variety of user controllable grids and then lets you save, copy or print your image. PhiMatrix can be used for any design application your mind can conceive, whether laying out a canvas for painting, designing a logo or website, cropping a photo, creating marketing materials or designing anything from clothes to cars to furniture to buildings. PhiMatrix unveils the phi proportions that can be found in DNA, sea shells, plants, animals and human faces and even in the stock market. The phi relationship, 1.618:1, known as the Golden Section (also mean, proportion or ratio) and the Divine proportion, has long been used by artists, architects, designers, engineers, musicians, photographers, sculptors, surgeons and stock analysts alike to achieve excellence in their results. Now you can use it too, to analyze and better appreciate what already exists, or to create and design your own masterpieces in the same proportions that give nature its beauty, harmony and balance.