Drew Gourley

Order Up!
A series of plugins for WordPress which allow for the ordering of pages, posts, and taxonomies through a simple 
drag-and-drop interface using the available WordPress scripts and styles. The plugins are extremely lightweight, 
without a bunch of unnecessary scripts to load into the admin. They also fall in line gracefully with the look 
and feel of the WordPress interface.

Custom Taxonomy Order

Allows for the ordering of categories and custom taxonomy terms through a simple drag-and-drop interface

Doug Wollison

Order Manager allows you sort posts and terms belonging to any post type or any taxonomy, 
as well as posts tagged with a specific term.
<h4>Options</h4>
Enable order manager for all posts/terms
This will add a new page to the WordPress menu under the associated post type. 
It provides you with a straightforward drag-and-drop interface to organize your 
posts or terms. If the post type or taxonomy supports a hierarchy, it will also 
let you easily reassign items to different parents by dragging them just below 
the intended parent.
This adds a new <code>'orderby'</code> value when using <code>get_terms()</code>: <code>'menu_order'</code>.
Enable post order manager for each term
Taxonomies with this option enabled will now offer a post order interface on 
each term’s edit screen, allowing you to set a unique order for posts in that 
term.
This adds a new <code>'orderby'</code> value when using <code>get_posts()</code>: <code>'term_order'</code>.
Note: this unique order will only take effect when listing posts belonging to 
a specific term that uses this.
Override order on <code>get_posts()/get_terms()</code>
This will cause all queries for posts/terms of that type to use the custom 
order by default, rather than by date/name. In the case of a query for posts 
belonging to a term with post-sorting enabled, it will use that order by default.

Custom Taxonomy Order vs Order Manager