Hassle Free Responsive Images for WordPress | CSS-Tricks
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Ridiculously Responsive Social Sharing Buttons by KNI Labs
Ridiculously Responsive Social Sharing Buttons
Responsive Inspector
Free Mobile Performance Testing with Akamai's Mobitest
Test your website performance on a mobile device
Responsive Tools For Web Designer & Developers
Responsive & Touch-Friendly Audio Player
min-device-pixel-ratio test
What’s your device’s min-device-pixel-ratio?
Responsive Design : Le guide de référence pour les SEOs
Web Design réactif Article traduit de Seomoz.org : Responsive Web Design: The Ultimate Guide for Online Marketers http://www.seomoz.org/ugc/responsive-web-design-the-ultimate-guide-for-online-marketers
Responsive background images with fixed or fluid aspect ratios – Voormedia
What's the easiest way to scale background images in responsive layouts? We use an old technique and enhance it to fluidly change the aspect ratio of background images.
10 Jaw Dropping Responsive Landing Pages
This Is Responsive | Tips, Resources and Patterns for Responsive Web Design
Patterns, resources and news for creating responsive web experiences
Golden Grid System
Four features Columns, gutters, a baseline and a script.
LukeW | Off Canvas Multi-Device Layouts
An approach worth giving a try
Debunking Responsive CSS Performance Myths
Really Useful Resources and Tools for Responsive Web Design
Using window.matchMedia to do media queries in JavaScript
10 Responsive Web Design Tutorials
35 Best Responsive WordPress Themes