The 960 Grid System is an effort to streamline web development workflow by providing commonly used dimensions, based on a width of 960 pixels. There are two variants: 12 and 16 columns, which can be used separately or in tandem.
In an effort to help developers and designers adopt this win-for-all approach to layout, Andrée Hansson has created the 960 Gridder browser overlay which can be triggered through a simple link in the browser.
Activating the 960 Gridder on this blog eventually looks like this, revealing that I have a small breakage of the 960 Grid system…
Please make a note of the control panel in the left side which allows for simple tweaking of the grid overlay… really really cool stuff.