Not too keen on the actual app but really interesting ways of displaying what they are doing.
Core Mobile App Landing Theme by Pierre Marais, via Behance
Unique Web Design, Line Mall #WebDesign #Design (http://www.pinterest.com/aldenchong/)
Gready - An Easy To Use App and Landing Page - HTML / CSS on Creattica: Your source for design inspiration
Focus - Free PSD Landing Page Template #app #website
PSD Template - RocketApp Responsive App Landing Page