notification for comments on Example Questions in Area51
15755
Area 51 reputation changes do not show up in the new Top Bar
31644
Show iPhone notifications when new questions arrive in a subscribed filter
92948
Allow Comments on Deleted Answers
147652
Get a notification when new answers are added to other people's question
23614
A method for the OP to accept comments?
83306
List of Comments on User Tab
99592
Email subscription to a given question answers *and* comments?
54856
Showing comments for a question should not fail a "first answer, known to be good" audit
14309
Collapse comments on old questions
131469
Obsolete comment flags should notify the original commenter in advance of moderators
64514
Can there be a notification for bounties started on questions you've asked or answered?
51469
Allow converting comments to answers
134187
Name finding problem with comment notification feature
147193
Should the site prompt new users to include an @name in comments?
54493
Allow new users to comment for X times in a day
135412
Does Stack Exchange have an email notification option?
59454
Use of the comment package