2 Web Tools for Grid Systems

The Heads-Up Grid is an overlay grid for in-browser website development, built with HTML + CSS + JavaScript. They’ve also got a version for responsive design sites that need multiple grids!

And then there’s Gridlover: “Gridlover keeps sizing type tidy and logical. Font sizes are calculated by stepping up the font size by the scale factor. To get your own content into Gridlover, write some Markdown in your favorite text editor and drag it here.”