w3review
Responsive website design for tablets, smart phones, television and desktop computers

Responsive website design

Mobile, tablet and desktop designs HTML5 & CSS3
 
Viewport testing tools
Display my view port size
Read more on responsive design and about this tool at Ben Frain website

Impact of Responsive Designs
www.lukew.com

Multi-Device Layout Patterns
www.lukew.com

Ethan Marcotte's favourite responsive web designs
www.netmagazine.com

Responsive Resources
bradfrost.github

Responsive Design Framework
Bootstrap

Responsive Web Design Testing Tool
mattkersley.com

Preview & inspect web designs on devices
adobe.com

Media Queries Debugging
github.com/bueltge

A Simple Device Diagram for Responsive Design Planning
www.metaltoad.com

Responsive Sketchsheets
zurb.com

Create Themes, Mockups, Websites and Webapps
www.boottheme.com

syntax highlighting of source code
code.google.com

SyntaxHighlighter
alexgorbatchev.com

icons and symbols
glyphicons.com

css tricks
css-tricks.com