Golden Grid System
Four features Columns, gutters, a baseline and a script.
Modular Grid Pattern
Useful web app to generate a grid pattern
A Richer Canvas | Mark Boulton
Good Fucking Design Advice
Good laugh, great advice and resources
Gridulator: Make pixel grids, lickety-split
Tell Gridulator your layout width and the number of columns you want, and it’ll spit back all the possible grids that have nice, round integers