HTML / CSS Frameworks

Pure
http://purecss.io/

Bootstrap
http://getbootstrap.com/

HTML KickStart
http://www.99lime.com/elements/

Semantic UI
http://semantic-ui.com/element.html

Mobile :

Lungo - HTML5 Cross-Device Framework
http://lungo.tapquo.com/

Reference :
bmark -title="18 Best CSS Frameworks for Accelerated Development | Code Geekz" http://codegeekz.com/css-frameworks-for-accelerated-development/