Beherit

Sends an simply email notification to the comment author, when someone replies to his comment. No configuration, support WordPress translation process.

Simple Comment Notification

Sends an simply email notification to the comment author, when someone replies to his comment.

Milan Kaneria

This plugin will insert a link in the comment form that will allow the comment author to delete their personal info from it that is stored in a cookie. Only unregistered commenter will be provided with the delete link if they already had a previously posted comment.
Support
For support queries, please leave your comments on the plugin page.

ET Remove Comment Author Info

This plugin allows commenter to remove their comment author details from the comment form.

Simple Comment Notification vs ET Remove Comment Author Info