Onde Screen Rulers for Mac is a screen ruler for that that allows you to precisely measure the dimensions of objects on your screen in pixels, inches, picas, centimetres, and calibrated units. A built-in protractor measures angles in degree and radians. It features customizable settings, keyboard shortcuts, a magnifying detail window, a logger Window with memo, a stay on top setting, and a memorizing function.
JS Measurer measures a webpage's width and height interactively. It lets the user define an area in the page by dragging the mouse pointer. The object renders the area outline as the mouse moves, showing the width and height of the area in pixels, as well the coordinates of the top-left corner of the area. A bookmarklet is also available, so this object can be used as a link placed, for instance, in the browser toolbar.