Automattic

10up

Mohammad Jangda

Jake Goldman

Lazy load images to improve page load times. Uses jQuery.sonar to only load an image when it’s visible in the viewport.
This plugin is an amalgamation of code written by the WordPress.com VIP team at Automattic, the TechCrunch 2011 Redesign team, and Jake Goldman (10up LLC).
Uses <a href="http://www.artzstudio.com/files/jquery-boston-2010/jquery.sonar/" rel="nofollow ugc">jQuery.sonar</a> by Dave Artz (AOL).

Lazy Load

I hate plugins that don't have any sort of settings or anything. I can't tell if it's actually doing anything. How can I check?

Can't tell if it's working

Lazy load images to improve page load times and server bandwidth. Images are loaded only when visible to the user.

nigro.simone

This plugin, implementing “Lazy Load” technique, avoids download of the pictures and iframe that are not displayed on the screen (for example: images in the bottom of the page) until the user will display them. This improves load speed of page and save the bandwidth.
Configurations are not required! You just have to install it and after the plugin does it all, none further action it’s required. 
This plugin is very light: only 5 kb.

Speed Up – Lazy Load

this plugin just jumped my google speed test by 10 points !

thank you !

Improves load speed of page and save the bandwidth.

Lazy Load vs Speed Up – Lazy Load