Dan-Lucian Stefancu

TwentyTen theme will break galleries with more then 3 columns (also 2 columns galleries look strange). This is a little fix.
TwentyTen, the default WordPress theme, removes the default dynamic styles from WordPress galleries, and adds some static CSS, so galleries with anything but 3 columns look broken. It?s not a WordPress bug, it is TwentyTen specific.
What is the problem? TwentyTen theme?s CSS sets all the gallery items width to 33%, so any gallery with more then 3 columns looks broken (the items are thrown on the next row), as the the total width of the gallery excedes the post width (4 x 33% = 132%).
This plugin adds some custom classes to galleries (eg. 4 columns: .width-25), and some CSS that fixes the width problem.
No configuration needed. Just upload, and install. The galleries will look as they should.
<a href="http://www.decetutorial.net/2011/01/twentyten-gallery-fix.html" rel="nofollow ugc">Plugin’s page</a>

TwentyTen Gallery Fix

TwentyTen theme will break galleries with more then 3 columns (also 2 columns galleries look strange). This is a little fix.

Mario Peshev

DevriX

This plugin allows you to easily create an image gallery on any post, page or custom post type. 
Images are can be added and previewed from the metabox. Images can be re-ordered by drag and drop.
About:
There comes a time when you need more flexibility than the standard WP gallery offers, That’s when this plugin steps in. 
This plugin’s goal is to make it easy to create a gallery and place it wherever you need. 
A perfect example would be to create a product gallery for an ecommerce website and then 
have the flexibility to position it where you wanted to match your theme’s design.
Features:
<ol>
<li>Added the possibility to add two or more different galleries on one page</li>
<li>Drag and drop re-ordering</li>
<li>Add gallery to any post, page or custom post type</li>
<li>If more than one image is added to the gallery, the images become grouped in the lightbox so you can easily view the next one</li>
<li>CSS and JS are only loaded on pages where needed</li>
<li>Images link to larger versions (can be turned off)</li>
<li>Fully Localized (translation ready) with .mo and .po files</li>
<li>Add multiple images to the gallery at once</li>
<li>Uses the thumbnail size specified in Settings -> Media</li>
<li>Custom webfont icon for hover effect</li>
</ol>
<h4>Whats’ New</h4>
<ol>
<li>Added Gutenberg Support</li>
<li>Added New Gallery – Luminous</li>
</ol>
<h4>Usage</h4>
Use the shortcode or the function to show the gallery.
<h4>Shortcode Usage</h4>
Use the following shortcode anywhere in the content area to display the gallery
<pre><code>[easy_image_gallery gallery="XXX"]
</code></pre>
Where “XXX” is the ID of the gallery item.
<h4>Template Tag Usage</h4>
The following template tag is available to display the gallery
<pre><code>if( function_exists( 'easy_image_gallery' ) ) {
 echo easy_image_gallery( "XXX" );
}
</code></pre>
Where “XXX” is the ID of the gallery item.
If you use the template tag above, you will need to remove the default content filter:
<h4>Developer Friendly</h4>
<ol>
<li>Modify the gallery HTML using filters</li>
<li>Developed with WP Coding Standards</li>
<li>Easily add your preferred lightbox script via hooks and filters</li>
<li>Easily unhook CSS and add your own styling</li>
<li>Pass in a different image size for the thumbnails via filter</li>
<li>Minimalistic markup and styling</li>
</ol>
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Easy Image Gallery

Easily create an image gallery on your posts, pages or any custom post type

TwentyTen Gallery Fix vs Easy Image Gallery