Boks is a cross-platform AIR app for visually creating grids using the Blueprint CSS framework. The app provides an inspector for setting up the page, column and gutter widths, provides typography settings for setting the vertical rhythm of your text, and generates the CSS and grid background image for you to export. Once your grid is set, draw sections in your grid, add lorem ipsum greeking, and the export file will include an HTML template with all of your divs laid out for you. Sweet.