Simple Responsive Images (simple-responsive-images) free WordPress plugin

This plugin generate images with attributes for the responsive images in your content.
Choose the breakpoints and the sizes associated.
The next images you will insert and the elements generated with the wp_attachement functions will begenerated with the right attributes.

Contribute on https://github.com/Rahe/Simple-responsive-images
Based on http://www.grahambird.co.uk/lab/doubletake/ for javascript