wpDiscuz User and Comment Mentioning allows to mention certain comments and users in comment text using #comment-id and @username tags. It comes with User Search bar, so you can find and tag any user/guest very easy. It also displays #ID of each comment to let you tag them. All mentioned users and comment authors will be notified via email. This addon replace @author and #comment-id to links with avatars. It opens a pop-up window with user and comment information when you hover on @author and #comment-id links. Please note, that the Comment Rich Editor must be enabled for this addon.
wpDiscuz – User & Comment Mentioning
hi
Bulldawg Illustrated
@eremon hi
test
Agree with
hamed hosseini on
nice comment @Tset
Test #1570
helllo
Geez, nice plugin…
This is test
this is test
#test
test
@test
Testing
Emilia 
Jason Galea @ezaro
this is a test @test
Testing
@Test Hello
@Zhexq hello
hello
hi
Testing
Emilia , 
Mark , 
Tautvydas Šlevas
hi
Ian Roller how are you doing?
Hey
Ann !
Ok
How does the #15 tag work?
There are missed opportunities with this and why on earth is rich text not foematted
O forgot I cannot edit. Now here is the problem post
#15
Another mention test
#493 точно так?
#15
Comment mention test
hi
Emilia
Sobre argilas lálá
Hello
Emilia
Better be good
Hallo
@Веніамін тест
Hi richard
Fab train
Trung @trung
Emilia emilia
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I’m mentioning #15 comment.
oi
Emilia
test
cool
nice