Responsive design, Picture element, HTML5, CSS3, SVG icons...
Internet Explorer before version 10 is not supported
The code is licensed under MIT License
Images are licensed under various Creative Commons Licenses, see each image directory for details.
Cantarell Font by Dave Crossland, GPLv3 licence.
The nylnook logo is
Other included things such as vendor libraries are likely already licensed by their own invidual licenses, so be sure to respect their licenses too.