Allow users with less than 50 rep to comment if they've already commented
117715
Always allow commenting on posts I have previously commented, irrespective of current rep
97524
Allow bounty owners to comment on questions they've placed a bounty on, even if they have less than 50 reputation
87776
Allow voting on comments from Review interface
34339
Lower the amount of reputation needed to comment
54493
Allow new users to comment for X times in a day
9834
Add a time limit before you can vote on a post
50556
Force Accepted Answers on Questions by Inactive Users
1153
How can a user with less than 10 rep can do a review on suggested edits?
27051
Why only one @user per comment?
56841
Make it more obvious that commenting is only possible after earning certain reputation
51469
Allow converting comments to answers
24412
"Leave a comment" link even when you can't
16146
Can we get x comment votes per y minutes, rather than one vote per 5 seconds?
110606
Can we get a comments only lock?
100443
Notification for comment upvotes
10721
"Requires 50 reputation" to comment on deleted posts
2290
Can we implement temporary automatic comment ban on 'x' number of validated rude comment flags?