Julio Potier

This plugin permits your members to delete their own account. You just can not delete all admin users, of course.
All languages are already supported because i use the internal l10n files form your installation 😉

Delete My Account

This plugin permits your members to delete their own account. All languages supported!

Sam Margulies

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.

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.

Delete My Account vs Delete Custom Fields