It’s very simply WordPress plugin for „nice“ shows pictures / galleries in lightbox. This plugin implements javascript library fancybox to header and footer pages created in WordPress, functions:
<ul>
<li>you can configure like original fancybox (in admin menu),</li>
<li>you can use multiple galleries on page,</li>
<li>it’s designed for NextGen Gallery.</li>
</ul>

ZMT fancybox

Plugin adds fancybox code to WP header and footer. This plugin is designed for NextGen Gallery. You can use multiple galleries on page.

Koen Schuit

<h4>NextGEN Gallery – Search Galleries</h4>
NextGEN Gallery – Search Galleries adds a search option to the existing NextGEN Gallery menu.
With this search option you can quickly and easily search through your galleries so you don’t have to go through a whole listst of galleries. 
The output of the search will show in a table similar to the manage galleries page and will provide a link to that gallery.
NextGEN Gallery – Search Galleries even adds an option to search in the description which can be helpfull if you don’t remember the name.
And NextGEN Gallery – Search Galleries also has the ability to search for part of the name or description. 
For instance: int will find internet, but also winter, ballpoint, saints etc.
Please note: this plugin requires NextGEN Gallery installed.
<h4>Key features:</h4>
<ol>
<li>Find galleries easily!</li>
<li>Search for name or description.</li>
<li>Outputs a link to the gallery.</li>
</ol>

NextGEN Gallery Search

Search a gallery within the NextGEN galleries including description search.

ZMT fancybox vs NextGEN Gallery Search