tags – The unofficial WordPress Plugin Directory

Admin users advanced permissions

Set up permissions for categories and taxonomies to admin users whose role is not "administrator"

Tags Autolink automatically turns tag names in posts and pages in links to the corresponding tag URLs. Keeps the original words case in text.

A WordPress widget showing the description of the first category in the single post currently being displayed.

Use post tags and categories with pages and custom post types.

WP Tag Delete – Tag Assassin, is a simple yet powerful plugin to delete those unused and unwanted tags.

Always show the tag cloud in the editor

Add related tags list(link list, text list, or cloud-style list) on the tag page, based on posts that have this tag.

Generate post tags from post title and content with Google. this plugin get help google.com to generate better tags for any type of content.

Pingcrawl adds a "Possibly related posts" capability by querying Google Blog Search for post tags and pinging the results.