Canned comments when downvoting new users
55656
Repository of useful pro-forma comments
85843
Reminding new users of accept/upvote "duty"?
47581
Marking comments as 'addressed by edit' to reduce noise
15280
Automatically generate comment with link to a "what does downvoting mean?" post when a user with <50 rep has a question downvoted
56841
Make it more obvious that commenting is only possible after earning certain reputation
68981
Improve the usability/intuitiveness of direct comment links
128209
Comment flag popup is hidden when flag from the negative voted answers
31986
"Belongs on" comments
69144
Should there be a "No vote, but okay" option in reviewing first posts?
137860
Automatically explain what downvotes on Meta mean
52100
Allow new users to flag comments on their own posts
42307
Why isn't providing feedback mandatory on downvotes, and why are ideas suggesting such negatively received?
93957
How do I prevent getting downvoted?
2625
How should I handle possible revenge downvotes?
34339
Lower the amount of reputation needed to comment
25445
Down and duplicate votes on my questions as a new user seem like bullying
117715
Always allow commenting on posts I have previously commented, irrespective of current rep