Disable Site Delete plugin completely disables the site/blog deletion by a non network administrator
Deletes all unused tags, handy tool if you want to start over with a quick clean blog.
FileManager for WordPress allows you to easily change, delete, organize and upload files.
This plugin allows you to delete content from your WordPress site/blog.
A quick way to disable or delete all approved, pending or spam comments and pings only with one click.
A quick way to delete all pending comments. Useful for victims of spammer attacks.
Removes the default admin bar from the front end of your site.
This plugin eliminates the selected-duplicated posts and pages from your blog.
You can now delete menu items with one-click, without having to open the ‘menu edit’ box.
This plugin used for add edit delete and listing module at admin side.Also user can search and sort records.
This plugin will help you to manage your upload folder, identify useless files and remove them and save space.
Deletes duplicate posts from the database (without affecting menus) each time a new post is published.
Remove every instance of a custom field from your site.
Plugin para gerenciar as postagens(visualização/deleção) de seu blog de forma facil
删除不需要的文章，节省空间，提高速度。delete posts which don't need any more,keep database clean and fast.
Mass Page Remover makes it easy to remove multiple pages at once.
Delete posts on your WordPress blog by keyword searching
Automatically deletes older articles that have not been read, based on WordPress.com stats.
Deletes all tags, handy tool if you want to start over with a quick clean blog.
This plugin will allow your users to delete their own account without any need for interaction on the administrator's behalf.
This plugin allows you to delete Posts, Pages and Comments without moving them to Trash first. Additionally it restores all Are you sure? questions.
Clean up unused images and other files from your uploads folder.
"Delete Del" removes del elements from RSS 1.0 feeds, and removes HTML comments from feeds and post/page content.
An Ajax Plugin Helper for the WordPress admin plugin page. Adds Ajax activate, deactivate, delete and upgrade functionality.
Uses wp_cron to delete comments each day that are marked "spam" in the database.
Easily remove any/all of the default WordPress dashboard widgets
AJAX-based table manager for WordPress. It is built using the excellent data grid from DrasticTools.
Update (17. November 2008): I keep this plugin here for reference but since WordPress 2.7 there's a [Plugin Installer](http://codex.wordpress.org/Vers