I just wanted to do this challenge on the Free Code Camp
Simple design with Twitter Bootstrap and Google fonts. For CSS I used PostCSS with Gulp. The quotes are retrieved via a simple Ajax request to the free API of Quotes on Design
Made this to get a true mobile first design up and running here. The only update I still want to make is when I know how to hide the browser statusbar :-P
The project makes full use of Google's guidelines for designing a website as a progressive web app. There is a manifest.json file and you can add the app to your home screen.
Adding the app to the homescreen
The progressive web app starts like a normal app in full screen mode