XGoldenSection is a graphical reference tool for the golden section. It shows the golden section between two points anywhere on the screen and over any graphics program you might be using.
It is a simple reference tool for the golden section which is fundamental to good design and found everywhere in nature.
It also has the option to confine the tool to the x or y axis only. In this mode it will display the pixel count. This helps for basic layout and web design, especially with css.
It has no standard window and floats over any graphics application you wish to use.