Websitecode

<p>This plugin adds a “Delete” link below comments made by logged-in users, allowing them to delete their own comments via AJAX, without page reload. Editing comments is not allowed.</p>


User Comment Delete

Allows logged-in users to delete their own comments via a Delete link under each comment.

Sam Margulies

<p>Ever have one erroneously entered custom field name confuse all of your users and you just can’t figure out how to get rid of it? Delete Custom Fields will let you delete every instance of a custom field from your site. Once your remove a custom field using this plugin it will not appear in your list of custom fields when you edit a post or page.</p>


Delete Custom Fields

Doesn't show all custom fields, though (even if you choose Show Hidden) - would be nice to have them as a list instead of a dropdown, but otherwise it does what it promises.

Works

Remove every instance of a custom field from your site.

User Comment Delete vs Delete Custom Fields