(More information coming soon! ^_^)
You can download a default build of ocGrid here. If you want to customize things, see the custom builds section below.
You can easily change ocGrid's layout by editing the $column_width or $gutter_width variables in grid.scss. If you choose to do that, you can either drop the edited SCSS file directly into your project, or run grunt build to compile a new version of the CSS.
ocGrid was created by Paul Straw and Sean Washington for Octopus Creative. It's MIT-licensed (see the license file for more info). Any contribution is absolutely welcome, but please review the contribution guidelines before getting started.