Alexandru Vornicescu

If you would like to have a little more nice permalinks to your custom post types articles with custom permalinks – this plugin can help you with this. 
If the term has the same slug as the post type, then the taxonomy has the priority over the post type.
Now I will show some examples:
(Custom taxonomy:)
<h4>From:</h4>
site.com/taxonomy/cars
<h4>To:</h4>
site.com/cars
(Custom taxonomy with child taxonomies)
<h4>From:</h4>
site.com/taxonomy/cars/bmw
<h4>To:</h4>
site.com/cars/bmw
(Term slug is the same as the post type slug:)
<h4>From:</h4>
(Post Type:) site.com/cars/ 
(Term from Taxonomy:) site.com/taxonomy/cars/ 
(Subterm from Taxonomy:) site.com/taxonomy/cars/bmw
<h4>To:</h4>
(Post Type:) site.com/cars/ (will not show) 
(Term from Taxonomy:) site.com/cars (will show) 
(Subterm from Taxonomy:) site.com/cars/bmw (will show)

Remove Taxonomy Base Slug

I needed to make categories and a custom taxonomy called "Industry" have no slug. But some other taxonomies needed to keep them. I wasn't sure if this would affect all taxonomies, but it has an option page to select them.
Simple enough, seems to work just fine!



Works, and lets you choose

the plugin has not been updated for a long time, but it still works fine. Thanks

Great

This plugin can remove specific taxonomy base slug from your permalinks (e.g. "/genre/fiction/" to "/fiction/").

dexxaye

Now supports custom post types.
Auto URL generates customized permalinks according to post types, categories and tags.
You can generate your own customized url for posts, pages and attachments by using different tokens.
Your posts and pages will still be accessible via your old permalinks.
WP 3.1 and up only. Beta version. Appreciate any feedback.
How To Use:
<ol>
<li>
go to URL Patterns page(wp-admin/admin.php?page=au-pattern) to set the patterns for post and page.
</li>
<li>
you can set patterns base on tags and categories
</li>
<li>
after you have set the patterns, click Bulk Generate URL to generate your custom url.
</li>
<li>
to see generated urls, got to url page(wp-admin/admin.php?page=au-url).
</li>
</ol>
Screenshots: <a href="http://www.bunchacode.com/programming/auto-url/" rel="nofollow ugc">http://www.bunchacode.com/programming/auto-url/</a>
Tested On: Firefox 5, Chrome 13, IE 7 and IE 8
-Available Tokens-
%id%
The unique ID # of the post, for example 423
%name%
A sanitized version of the title of the post.
%namepath%
A sanitized version of the full title path of a page. Similar to %name% but shows the it’s
title path which includes title of it’s parent. Only available to pages.
%category%
A sanitized version of the category name. Uses only the first category.
%categories%
A sanitized version of the all the category names.
%categorypath%
A sanitized version of the category path name.
%blogname%
A sanitized version of the blog name.
%tag%
A sanitized version of the tag name. Uses only the first tag
%tags%
A sanitized version of all the tag names.
%author%
A sanitized version of the author name.
%year%
The year of the post, four digits, for example 2004
%monthnum%
Month of the year, for example 05
%day%
Day of the month, for example 28
%hour%
Hour of the day, for example 15
%minute%
Minute of the hour, for example 43
%second%
Second of the minute, for example 33

Auto URL

Auto URL generates customized permalinks according to post types, categories and tags

Remove Taxonomy Base Slug vs Auto URL