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

manuelmasia

If you’re looking for an advanced WordPress slideshow: <a href="http://codecanyon.net/item/shortcodelic-wordpress-plugin-bundle/6076939?ref=pixedelic" title="Shortcodelic plugin bundle" rel="nofollow ugc">Shortcodelic plugin bundle</a> (it also includes many other features: tabs, accordions, Google maps, pricing table, a page composer…).
A jQuery slideshow with an adaptive/responsive layout, easy to use with an extended admin panel. It already provides ColorBox, TimThumb, many effects. You can include it into your theme by using the shortcode (through a useful TinyMCE custom button) or through a meta-box by adding some lines of code to your theme.
Here is the demo page: <a href="http://www.pixedelic.com/plugins/camera/wp.php" title="Camera slideshow" rel="nofollow ugc">Camera slideshow</a>

Camera slideshow

A jQuery slideshow with a responsive layout, easy to use with an extended admin panel

AT Lazy Loader vs Camera slideshow