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.

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Import to Photo Gallery from NextGen gallery is an easy setup addon for importing photos and related data from NextGen Gallery plugin to Photo Gallery.
Plugin allows importing not only NextGen galleries and albums but also related data. This include photo tags and comments. This means that you can import individual or specific album from NextGen or choose to import all albums and galleries.
The imported data gets switched from NextGen structure to Photo Gallery, so the galleries and albums can be further modified and changed based on Photo Gallery options.

Import to Photo Gallery from NextGen gallery

Import to Photo Gallery from NextGen gallery  is an easy setup addon for importing photos and related data from NextGen Gallery to Photo Gallery.

ZMT fancybox vs Import to Photo Gallery from NextGen gallery