This WordPress plugin will make your website look amazing on the Retina displays. The most adequate images will be always delivered to your visitors using the method you prefer.
I wrote an extensive explanation on Retina Displays and how works the plugin here: Retina Displays and the WordPress Plugin. This is a must-read for any users of this plugin.
QUICK OVERVIEW & SCREENSHOTS
I will start with the most important piece of advice at this point: DO NOT USE THE WORDPRESS “FULL SIZE” IMAGE DIRECTLY, EVER. First you need to install it, then go check the Basics settings.
The Advanced settings let you choose a method.
The next step is to create all those Retina files for your existing images. Check the new menu in Media where you will find the Retina Dashboard.
Most of the time, of course, you will only be using the Media Library. Please notice that there is a Retina column available now.
For more information, don’t forget to check the Tutorial.
Check it out on the WordPress Plugins Repository: WP Retina 2x. When this page was written, the version was 2.0. Might be a most recent one now :)