Aaron D. Campbell

Gives you the ability to simply drag and drop to reorganize your images how you 
want them to appear in your gallery. If drag and drop isn’t your thing, it also 
adds an “Order” field to the images in your gallery, much like pages have, which 
allows you to reorder them to display in whatever order you want. Requires PHP5.
If you are having problems sorting since version 1.0.1 of this plugin, read this:
In order to fix another bug, I had to use the filename as a “handle” to drag by. 
When you move your cursor over the name of the file, it should change to a 
“move” cursor, at which time you can drag/drop the image as before.

Reorder Gallery

Allows you to reorder your gallery images with the ease of drag and drop. Resquires PHP5.

Vayu Robins

This plugin will help you manually reorder or sort the images attached to your post, custom post type or page. Once installed and activated you can choose which post type or page you want this functionality on. All the images attached to that specific post or page will then be listed on the post-edit page in the admin. You will then be able to drag & drop the images in the order you want them to be listed.
This will only affect those images uploaded to the specific post or page.
Insert images into post/page with this shortcode: <code>[list_attached_images]</code> 
Her are some parameters
<ul>
<li>imagesize: ie. thumbnail, medium, large</li>
<li>numberimages: ie. -1, 0, 5</li>
<li>imagelink: link to the image file – false/true</li>
<li>order: ie. desc, asc</li>
<li>listclass: use your own class</li>
</ul>
Example: 
 [list_attached_images imagesize=”large” numberimages=”3″ imagelink=”true” order=”asc” listclass=”my-images”]
Here is the php code that will help you display the images in your theme:
<pre><code>$thumb_id = get_post_thumbnail_id( get_the_ID() );
$args = array(
 'post_type' => 'attachment',
 'post_mime_type' => 'image/jpeg',
 'orderby' => 'menu_order',
 'numberposts' => -1,
 'order' => 'ASC',
 'post_parent' => get_the_ID(),
 'exclude' => $thumb_id // Exclude featured thumbnail
);
$attachments = get_posts($args);
if ( $attachments ) :
 foreach ( $attachments as $attachment ) :
 echo wp_get_attachment_image( $attachment->ID, 'full' );
 endforeach;
endif;
</code></pre>
<h3>Website</h3>
http://vayu.dk/reorder-entry-images/

Reorder Entry Images

Get all the attachments (images only) that belong to a post/page/post-type and display them in a list. This list can be reordered by drag and drop.

Reorder Gallery vs Reorder Entry Images