gm_alex

This release is a beta release, so error could occur. If you notice an issue please create a issue here: https://github.com/GM-Alex/user-access-manager-nextgen-gallery-extension/issues 
This plugin allows you to use the <a href="https://wordpress.org/extend/plugins/user-access-manager/" rel="ugc">User Access Manager</a>-Plugin to control the access for the <a href="https://wordpress.org/extend/plugins/nextgen-gallery/" rel="ugc">NextGEN Galley</a>-Plugin. You can lock Albums, Galleries and Images.
Feature list
<ul>
<li>Hide albums (if no access)</li>
<li>User-defined album content (if no access)</li>
<li>Hide galleries (if no access)</li>
<li>User-defined gallery title (if no access)</li>
<li>User-defined gallery content (if no access)</li>
<li>Hide images (if no access)</li>
</ul>

User Access Manager – NextGEN Gallery Extension

With this plugin you can use the "User Access Manager" to control the access for the "NextGen Gallery".

atow

WP-SmugMug integrates your SmugMug galleries into your Posts and Pages on your WordPress blog. SmugMug is a popular online photo sharing website at <a href="http://www.smugmug.com/" rel="nofollow ugc">http://www.smugmug.com/</a>.
Visit the <a href="http://www.tow.com/projects/wordpress/wp-smugmug/" rel="nofollow ugc">WP-SmugMug homepage</a> for more information on how to incorporate the plugin into your blog.

WP-SmugMug

WP-SmugMug integrates your SmugMug galleries into your Posts and Pages on your WordPress blog.

User Access Manager – NextGEN Gallery Extension vs WP-SmugMug