There are a lot of online generators which are of no use to any designers, however some can help designers to an extent. Some example of online generators are favicon generators, background generators, button generators, and badge generators. Some of the useful kinds are the ones that solve one purpose with quick and easy steps, especially useful for new designers, following is a list of some useful CSS grid layout generators.

Grid Layout Generator By PageColumn:

Blueprint Grid CSS Generator:

Grid Generator By NetProtozo:

Grid Generator By DegisnByGrid:

Grid System Generator:

YUI CSS Grid Builder:

Variable Grid System:

Firdamatic:

CSS Sourced Ordered Variable Border Columed Page Maker:

Grid Designer: