Say you want to create an app. The first thing you’d probably do, after coming up with that million-dollar idea, is take out a notebook and start getting some ideas on paper. You could sketch concepts and wireframes, even going as far as noting those elements’ functionalities. But these static images are still just that: lifeless doodles that do little to inform how they’ll actually behave on a phone or tablet.
Read more >> http://www.wired.com/design/2013/09/appseed-transforms-your-sketches-into-app-prototypes/
Modus Versus is a free multi-purpose PSD template, designed on the 1170 grid system. Excellent for use with responsive frameworks like the popular Twitter Bootstrap, it could form the basis of a good corporate site.
Designed by Dimitar Tsankov, aka Outlinez; 12 PSD files are included, fully layered and organized into folders. Unfortunately the stock images aren’t included.