DefProc

WordPress plugin to automatically add rel=”lightbox” attribute to link wrapped images, as placed into WordPress posts.
This plugin requires lightbox or slimbox (or any lightbox-compatible image handler) to also be installed on your site, either as part of the theme, or via a plugin. If either lightbox, or add-rel-lightbox is not activated at any time, your site will revert gracefully to the standard “open image as new page”.
The plugin currently only works with images placed into posts using the “add media” dialogues, and will only apply to images that are in your media library. However, it will also not interfere with any images that have already have attributes applied to them.
add-rel-lightbox also works with the [gallery] shortcode, adding the rel=”lightbox” attribute to links created by it. Note that you will have to use the <code>[gallery link="file"]</code> format, or select “Image File” when inserting the gallery for lighbox to work as expected. Galleries that link to the attachment page are unaffected by this plugin.
In addition to applying rel=”lightbox”, this plugin will retrieve the media library caption for any images, and correctly escape any html entities, so that the caption is displayed as expected in the lightbox.

add-rel-lightbox

Add rel="lightbox" to <a> wrapped image links in the content and to [gallery] image links, and include captions for lightbox/slimbox

Sumon Hasan

WP Slim Gallery allows you to add gallery items in your wordpress website. This plugin is based upon Slimbox2. It is very easy to use with a simple shortcode.Just use this code [slimgallery] to publish your image gallery .
<h4>Demo</h4>
Go to <a href="http://sumonhasan.com/plugins/wp-slim-gallery/" rel="nofollow ugc">Plugin Demo Site</a>
<h4>Usage</h4>
Follow the instructions below.
<ol>
<li>
Go WP Slim Gallery > Add New.
</li>
<li>
Give a title and upload image from select your image for WP Slim Gallery.
</li>
<li>
Create a category and select the category. And publish the post.
</li>
<li>
Add new image as much as you want to publish.
</li>
<li>
Use this shortcode in your post or page or widget.
[slimgallery]
</li>
<li>
To use this shortcode in your template, write
</li>
</ol>
<h4>More Usage Info</h4>
Use this code to get to publish your WP Slim Gallery from a particulat category and gallery image count.
<pre><code>[slimgallery category="Your_Category_Name" count="4"]
</code></pre>

WP Slim Gallery

This plugin helps to add image gallery in your wordpress website. It's very easy to use with a simple shortcode.

add-rel-lightbox vs WP Slim Gallery