umapathieitb

This plugin allows you to easily reorder your WordPress posts by dragging and dropping them in the admin “All Posts” list. 
It updates each post’s <code>menu_order</code> value and can optionally modify front-end queries so that posts are displayed in the same order you set.
<h3>Features</h3>
<ul>
<li>Adds a “Reorder” column with a drag handle in the Posts list.</li>
<li>Supports drag and drop reordering directly in the WordPress admin.</li>
<li>Saves order instantly via AJAX.</li>
<li>Optionally changes front-end queries to order by <code>menu_order</code> instead of date.</li>
<li>Lightweight, no external dependencies.</li>
</ul>

Elephant Post Order

Reorder your WordPress posts with a simple drag & drop interface in the admin panel

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.

Elephant Post Order vs Reorder Gallery