Foundation for Apps is here! “The first front-end framework created for developing fully responsive web apps”.
It uses whole new vertical grid system with independent scrolling sections, perfect for building panel based applications.
Like every other Foundation release, its a very advanced framework which is at the forefront of web-apps, and from which most other frameworks are going to copy many functionalities and/or components.
Also homepage features already built templates for apps like Email, Music, Chat, Productivity, and others, so you can grab one and start from there
Its probably going to be a year or two ’til the competition catches up, so if you want to use the best of the best right now, use Foundation for Apps.