Have the comment reply autocomplete popup for more than one user
44835
Allow more than one @name notification per comment
120472
Add/Show comments focuses text box by default
1419
How do comment @replies work?
19115
Mark a comment as the answer to a question
127692
One comment per user per post but be able to reply to existing comments
59454
Use of the comment package
20778
Comment submission broken for comments that end with @username
133560
Omit comment replies from the minimum character limit check
53453
Show all comments if there is just "1" extra comment to show
130885
Information of the user in comments
28900
Comments saying "thank you" remind OP to accept answer
41144
Touch friendly comments
66719
Can we allow moderators to upgrade a comment to an answer?
47340
Add self-answer delay for all users
138671
Allow users to leave an anonymous comment when voting
125808
Could the tags autocomplete widget please show more than six options?
58852
Using @ signs in comments without invoking comment replies?