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.

Babu Kolassery

You can use the Custom Reorder Manager ( CRO ) plugin to take full control of your WordPress post’s sort order.
Add reorder on demand. Our CRO settings allow you to add Re-order sub menu under WP custom/default post-types with just a click of the button!
Add them any type. Reorder manager can be added to all public post-types such as post, page, media and custom post-types!
Add them any taxonomy. Reorder manager can be added to all taxonomies such as categories, tags and custom taxonomies!
Show them everywhere. Load and display your posts in CRO order using any theme template file with our hassle free and developer friendly functions!
Made for developers. Use functions like: cro_posts(string post_type, array $args = null) and cro_posts_by_taxonomy(array $cro_params, array $args = null) to build powerful templates fast.
<h4>Features</h4>
<ul>
<li>Simple & Intuitive</li>
<li>Powerful functions</li>
<li>User friendly drag & drop sorting</li>
<li>Taxonomy & custom post-type based sorting</li>
</ul>

Custom Reorder Manager

Reorder WordPress posts with drag & drop mechanism.

Reorder Gallery vs Custom Reorder Manager