asentechnology

This plugin lazy loads images by initially serving either blank images or low-res images and then loads the high-res version according to their distance from the initial scroll position.

AT Lazy Loader

Angry Creative

Bjørn Johansen

arontornberg

Lazy loading makes your site load faster and saves bandwidth.
This plugin replaces all your post images, post thumbnails, gravatar images and content iframes with a placeholder and loads the content as it gets close to enter the browser window when the visitor scrolls the page. Also works with text widgets.
Since it works with iframes, it also covers embedded videoes from YouTube, Vimeo etc.
You can also lazy load other images and iframes in your theme, by using a simple filter.
Non-javascript visitors gets the original element in noscript.
Compatible with the <a href="https://wordpress.org/plugins/ricg-responsive-images/" rel="ugc">RICG Responsive Images</a> plugin for responsive images.
Please let me know if you have any issues. Fastest way to get a response is by Twitter: https://twitter.com/bjornjohansen
<h4>Translations</h4>
<ul>
<li>Russian (ru_RU) by Elvisrk</li>
<li>Hebrew (he_IL) by Imri Sagive</li>
<li>Polish (pl_PL) by Maciej Gryniuk</li>
<li>Norwegian Bokmål (nb_NO) by Bjørn Johansen</li>
</ul>
<a href="https://github.com/bjornjohansen/bj-lazy-load" rel="nofollow ugc">Development happens at GitHub</a>. Pull requests are very welcome.
<h3>Optional usage</h3>
If you have images output in custom templates or want to lazy load other images in your theme, you may pass the HTML through a filter:
<pre><code><?php
$img_html = '<img src="myimage.jpg" alt="">';
$img_html = apply_filters( 'bj_lazy_load_html', $img_html );
echo $img_html;
?>
</code></pre>
Note for developers: The filter has a priority of 10.

BJ Lazy Load

Lazy loading for images and iframes makes your site load faster and saves bandwidth. Uses no external JS libraries and degrades gracefully for non-js  …

AT Lazy Loader vs BJ Lazy Load