List Free Wordpress Theme Framework

About wordpress theme framework
A theme framework is a theme that is designed to be a flexible foundation that can serve as a parent theme for building child themes. The use of WordPress theme frameworks may ease theme development by reducing the volume of work which may be needed in creating a backbone for your theme (usually by using PHP and WordPress Template Tags).

Theme frameworks also make theme development more accessible, removing the need for programming knowledge.

Here the list of free popular wordpress theme framework:

1. Thematic - http://themeshaper.com/thematic-for-wordpress/
   Thematic is a free, open-source, highly extensible, search-engine optimized WordPress Theme Framework featuring 13 widget-ready areas, grid-based layout samples, styling for popular plugins, and a whole community behind it.
   Who's behind = Ian Stewart
   View live demo - Forum - Browse the code - Download the parent theme - Get child theme
   
2. Hybrid - http://themehybrid.com/themes/hybrid
   This theme was designed with content in mind. There is no other theme that will display your content in a meaningful way like this one does. It’s all about getting your information out there to the world. Without all the fuss. That’s what Hybrid does.
   Who's behind = Justin Tadlock
   View live demo - Forum - Download the parent theme - Get child theme
3. Sandbox - http://www.plaintxt.org/themes/sandbox/
   The Sandbox is a powerful tool available for WordPress theme designers and developers. The Sandbox can be easily designed just with CSS, so beginners will feel comfortable not bothering with PHP.
   Who's behind = collaboration between Andy and Scott
   View live demo - Forum -Browse the code - Download the parent theme - Get child theme
4. Wpframework - http://wpframework.com/
   View live demo - Forum - Browse the code - Download the parent theme - Get child theme
   
5. Carrington
   A developer friendly theme with atomic templates and an elegant override hierarchy. Carrington is a CMS theme framework for WordPress from Crowd Favorite
   Who's behind = CrowdFavorite.com
   Documentation - Forum - Browse the code - Download the parent theme
   
6. Whiteboard
   View live demo - Forum - Browse the code - Download the parent theme - Get child theme
   
7. Thesis - http://diythemes.com/thesis/
   View live demo - Forum - Browse the code - Download the parent theme - Get child theme
   
8. Vanilla
   View live demo - Forum - Browse the code - Download the parent theme - Get child theme
   
9. OnePress Community Framework
   View live demo - Forum - Browse the code - Download the parent theme - Get child theme
10. WordPreciousss
11. WPCandy Framework
12. Basis
13. CSSFOX
14. Modularity multimedia theme framework

Another great theme framework concept based on wordpress

1. iPhone Wordpress Theme Framework
2. PSD Framework for Creating WordPress Themes from area381.com
   

Another useful source

• Building a WordPress framework by hyalineskies.com
• WordPress Themes: Start With a Solid Framework by Lorelle
• Blank Themes, Frameworks and Templates: Resources to Speed Up Your Development Time by designm.ag
• Build a Newspaper Theme With WP_Query and the 960 CSS Framework by net.tutsplus.com
• Why I created a WordPress theme framework by justintadlock.com
• Theme frameworks - Wordpress Codec
• Introduction to Themes and Plugins - Wordpress Tutorial Series by serpentcouncil.com
• Parent/Child Themes in WordPress: The Future of WordPress Themes by Lorelle
• WordPress Theme Options Framework by clark-technet.com
• Frameworks, Child Themes, Filters, and Hooks? by wpcandy.com
• 12 Really Handy CSS Framework, Template And Snippet Sites For Smart Web Designer by 1stwebdesigner.com
• Framework Viability by adii.co.za