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WordPress Frameworks Unfinished Business.

WooThemes: Canvas  version 6 is coming out in the next six months of 2015 only about 6 of the present themes are fully responsive.

How to upgrade from Canvas 5 to 6 is still binging worked out by WooThemes. However it might not be possible to upgrade from older themes.

iThemes: Builder Framework. https://ithemes.com/purchase/builder-theme/

Facts 

1) 90 themes not all of them are responsive.

2) a visual builder 

3) Builder seems to be a theme/plugin/ hybrid.

Prices 

Foundation series 5 theme fully responsive pack for $80.

All 90 themes however many of these themes are not responsive 

Elegant Themes: http://www.elegantthemes.com/

Divi 2.0 Theme/Framework hybrid 

This is a new version of Divi 2.0 and has an visual editor inbuilt into the theme.

Price you can get Divi and 87 other older type themes for $69.