As a huge fan of WordPress and its community I’m always intrigued by new plugins and frameworks for WordPress
A Responsive, Drag & Drop Framework for Beautiful Websites. Built for WordPress with Bootstrap, CSS3 & HTML5
PageLines is commercial framework for WordPress. For $97 you get the complete professionell edition. If you are a developer you might prefer the developer edition for $197. For a web professional this is a very small price compared to what you get and what it can do for your client.
I haven’t tried it yet myself, but from what I can see from their demo and feature sections it looks pretty cool. I will most likely try it in the near future.