Skeleton: Beautiful Boilerplate for Responsive, Mobile-Friendly Development
60 Examples of Responsive Website Design
The Boston Globe
vs.
The New York Times
Try re-sizing web browser window... First news site adjusts automatically,
and the second one stays the same... so they need a separate "mobile" version, or app.
Responsive Web Design is done by clever use of CSS and JavaScript,
completely on "client side", in the browser...