https://github.com/Elkfox/Concrete for an up to date, super lightweight Shopify theme framework.
IMPORTANT NOTICE: This project is no longer actively updated (though PRs are very welcome). You may want to check out Concrete by Elkfox over atShopify Theme Framework
Hey hey hey ;)
This theme is built almost entirely from the Zurb Foundation framework, and Shopify liquid markup, with a few little extra touches added for good measure.
The template is intended as a rapid Shopify theme development framework for developers.
Demo: https://theme-framework.myshopify.com
Zurb Foundation Docs: http://foundation.zurb.com/docs
Shopify Theme Docs: http://docs.shopify.com/themes
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Copyright (C) 2013 Cam Gould http://camgould.com
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
Please see full license information at http://opensource.org/licenses/GPL-3.0