“UnityGUI allows you to create a wide variety of highly functional GUIs very quickly and easily... you can do everything at once with just a few lines of code.” - Unity docs

GUIMaker builds upon the simplicity of UnityGUI by providing an intuitive, visual, click-and-drag-design, WYSIWIG (what you see is what you get) editor that lets you rapidly position GUI elements around the screen with a simple click-and-drag interface, to do away with the manual calculation of positions and sizes, producing nicely formatted and commented script for in-game and editor window GUIs.