Allow users under 50 rep to post one or two comments daily
2514
Why do I need 50 reputation to comment? What can I do instead?
88207
Automatically protect questions with three or more low-rep-user deleted answers
141234
Should we have a down-vote “safe zone” for new users with less than 50 reputation?
87689
Can users with less reputation be allowed to chat?
128269
Comments asking for upvotes/accepts
41186
Allow inviting people with rep < 20 to private chat?
130885
Information of the user in comments
27051
Why only one @user per comment?
7147
Allow for setting comments to "auto-expire", to become "temporary comments"
22991
A way for "new users" to ask about their post specifically
24412
"Leave a comment" link even when you can't
87776
Allow voting on comments from Review interface
1153
How can a user with less than 10 rep can do a review on suggested edits?
117715
Always allow commenting on posts I have previously commented, irrespective of current rep
105735
Flag individual comments or flag once for many?
44835
Allow more than one @name notification per comment
129908
Allow flagging own comments