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.

xieno

XE Author List Widget Plugin displays list of authors. It also displays authors Email avatars.
XE Author List Widget Plugin displays list of authors. It allows to admin number of authors to display. admin can set author avatars image size email.

XE Author List Widget

XE Author List Widget Plugin displays list of authors. It also displays authors Email avatars. XE Author List Widget Plugin displays list of authors.

Simple Comment Notification vs XE Author List Widget