kdmurray

This plugin will generate an tag for a random image selected from a specified folder.
<h3>Setup Instructions</h3>
<ol>
<li>Extract randomImage.php into your wp-content/plugins folder (or a subfolder)</li>
<li>Activate the plugin in WordPress</li>
<li>On the options screen, select the “Random Image” menu</li>
<li>Fill in the values for your physical and http paths</li>
<li>Select scaling options (optional)</li>
<li>Add some code to whatever page you want to display the image. This is a great way to 
customize the header image for your wordpress installation. The plugin will look in 
the folder and randomly select a header image to display.</li>
</ol>
<h3>Sample Code</h3>
By placing code like the following in your header, it will create an image tag for you 
based on the images in the specified folder.
<?php 
 if (function_exists(‘generateRandomImgTag’)) 
 { 
 generateRandomImgTag(); 
 } 
 ?>
<!– 
The lines above are for the HTML documentation (online)
–>
This code will ensure that the function exists (ie the plugin is active and working) and 
call it if it’s working correctly. If the function is missing, or the plugin has been 
removed then the call will be ignored, and no errors will result.
<h3>Feedback</h3>
kdmurray.at.kdmurray.dot.net

Random Image Selector

This plugin will generate an  tag for a random image selected from a specified folder.

techotronic

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A Colorbox/Lightbox plugin for WordPress.
jQuery Colorbox features 11 themes from which you can choose. 
Works out-of-the-box with WordPress Galleries and <a href="https://wordpress.org/extend/plugins/nextgen-gallery/" rel="ugc">NextGEN Gallery</a>! (choose no effect in NextGEN settings)
When adding an image to a post or page, usually a thumbnail is inserted and linked to the image in original size. 
All images in posts and pages can be displayed in a Lightbox/colorbox when the thumbnail is clicked. 
Images are grouped as galleries when linked in the same post or page. Groups can be displayed in a slideshow within the Lightbox/colorbox.
Individual images can be excluded by adding a special CSS class.
jQuery Colorbox can also open linked content (external as well as inline) in a Lightbox/Colorbox.
For more information visit the <a href="https://wordpress.org/extend/plugins/jquery-colorbox/faq/" rel="ugc">FAQ</a>. 
If you have questions or problems, feel free to write an entry at <a href="https://wordpress.org/tags/jquery-colorbox?forum_id=10" rel="ugc">the jQuery Colorbox WordPress.org forum</a>
Localization
<ul>
<li>Arabic (<code>ar</code>) by <a href="http://www.photokeens.com" rel="nofollow ugc">Modar Soos</a></li>
<li>Belorussian (<code>be_BY</code>) Marcis G.</li>
<li>Bosnian (<code>bs_BA</code>) by Vedran Jurincic</li>
<li>Bulgarian (<code>bg_BG</code>) by <a href="http://nikolay.zaynelov.com" rel="nofollow ugc">Nikolay Zaynelov</a></li>
<li>Czech (<code>cs_CZ</code>) by David Weis</li>
<li>Simplified Chinese (<code>zh_CN</code>) by <a href="http://tech.yiandya.com/" rel="nofollow ugc">Lucas Ho</a></li>
<li>Danish (<code>da_DK</code>) by Michael Bering Petersen</li>
<li>Dutch (<code>nl_NL</code>) by <a href="http://nl.linkedin.com/pub/richard-laak/b/b21/672" rel="nofollow ugc">Richard van Laak</a></li>
<li>English (<code>en_EN</code>) by <a href="http://www.techotronic.de/" rel="nofollow ugc">Arne Franken</a></li>
<li>Finnish (<code>fi</code>) by <a href="http://www.merisaari.com/" rel="nofollow ugc">Lauri Merisaari</a></li>
<li>French (<code>fr_FR</code>) by <a href="http://www.monblogamoua.fr/" rel="nofollow ugc">Pierre Sudarovich</a></li>
<li>German (<code>de_DE</code>) by <a href="http://www.techotronic.de/" rel="nofollow ugc">Arne Franken</a></li>
<li>Hebrew (<code>he_IL</code>) by <a href="http://www.TommyGordon.co.il" rel="nofollow ugc">Tommy Gordon</a></li>
<li>Italian (<code>it_IT</code>) by Marco Chiesi</li>
<li>Latvian (<code>lv</code>) by Uldis Jansons</li>
<li>Malay (<code>ms_MY</code>) by <a href="http://www.inisahaini.com" rel="nofollow ugc">Saha-ini Ahmad Safian</a></li>
<li>Polish (<code>pl_PL</code>) by Kornel Łysikowski</li>
<li>Portuguese (<code>pt_BR</code>) by <a href="http://twitter.com/gervasioantonio" rel="nofollow ugc">Gervásio Antônio</a></li>
<li>Romanian (<code>ro_RO</code>) by Luke Tyler</li>
<li>Russian (<code>ru_RU</code>) by Arkadiy Florinskiy</li>
<li>Slovak (<code>sk_SK</code>) by B. Radenovich</li>
<li>Spanish (<code>es_ES</code>) by Inma P.-Zubizarreta</li>
<li>Swedish (<code>sv_SE</code>) by <a href="http://www.theindiaexperience.se/" rel="nofollow ugc">Christian</a></li>
<li>Turkish (<code>tr_TR</code>) by <a href="http://www.serhatyolacan.com/" rel="nofollow ugc">Serhat Yolaçan</a></li>
<li>Ukrainian (<code>uk</code>) by Jurko Chervony</li>
<li>Vietnamese (<code>vn_VN</code>) by Techfacts</li>
</ul>
Is your native language missing? 
Translating the plugin is easy if you understand english and are fluent in another language. 
I described in the <a href="https://wordpress.org/extend/plugins/jquery-colorbox/faq/" rel="ugc">FAQ</a> how the translation works.
Credits 
Includes <a href="http://jacklmoore.com/colorbox/" rel="nofollow ugc">ColorBox</a> 1.4.33 jQuery plugin from Jack Moore. 
The picture I used for the screenshots was designed by <a href="http://wallpapers.vintage.it/" rel="nofollow ugc">Davide Vicariotto</a>

jQuery Colorbox

This is the best WordPress plugin ever!



Best Plugin EVER!

I rarely install plugins on my client's websites but I do have a couple of "utility" plugins to make my life easier with development. This is one of them.

Have been using this plugin for years now and it is a great solution for any site that needs a colorbox effect.

Thanks for the plugin!

Easy to use and developer friendly.

Adds Colorbox/Lightbox functionality to images, grouped by post or page. Works for WordPress and NextGEN galleries. Comes with different themes.

Random Image Selector vs jQuery Colorbox