Weston Ruter

Topher

Jonathan Bardo

Shadi Sharaf

X-Team

This plugin brings the power of @mention inside tinyMCE. You can choose where the autocompletion gets his information from and on which custom post type this plugin is activated on. You can also create custom template replacement on the front-end based on your needs.
A review of the plugin is available on <a href="http://wptavern.com/mentionable-plugin-adds-mentions-for-wordpress-content-with-inline-autocomplete" rel="nofollow ugc">WP Tavern</a>.
Development of this plugin is done <a href="https://github.com/x-team/wp-mentionable" rel="nofollow ugc">on GitHub</a>. Pull requests welcome. Please see <a href="https://github.com/x-team/wp-mentionable/issues" rel="nofollow ugc">issues</a> reported there before going to the plugin forum.

Mentionable

Mention WordPress content with inline autocomplete inside tinyMCE.

Raulanton

This ultra light-weight plugin send a customizable notification email to each user/author mentioned in a comment.
Mentions: A mention is an username preceded by the mention qualifier.
Username: This plugin will look for the username in display_names and logins. Multiple authors could be mentioned in a comment.
Qualifier: Can be a character but also a string. 
The default qualifier is ‘@’ to work as in Twitter, but it could be changed via admin menu to be ‘#’ or even an string like ‘Mention:’ .
Email:
The email can be customized to include or not the whole comment in wich the mention is. 
The email can be customized to add a reference to the mentioner profile at the site. 
It is also possible to define email header and footer. 
The email can include the URl to the comment in which he/she was mentioned
I18N:
This plugin is I18N (es_ES, en_US, fr_FR) 
Any help with translations will be nice!

Email Mentioned

Email Mentioned is a lightweight customizable -no coding needed- plugin to send an email to each user mentioned in comments.

Mentionable vs Email Mentioned