This plugin displayes a number of comments in posts crossposted to LiveJournal.
This plugin allows you to generate a gravatar URL. It also shows LiveJournal userpics in comments.
This plugin shows you information gathered by the Bad Behaviour plugin. You get to see the IP blocked, the date and the URL accessed.
this plug-in check the required fields before visitor submiting the comment, and show nice message notice him about the error also highlight the requi
Edit Comments XT is a simple WordPress plugin that allows commenters to edit their own comments.
Wordpress Commentracker helps you tracking your comments across the blogosphere and storing them on your own blog.
Send email notifications to multiple addresses (not just admin) when new comments are posted on your site.
Recovers lost comments by copy/pasteing your **new comment** notification emails
Prevents comment spam and fights against comment spammers by delaying their attempts
Remind your visitors about the age of old posts in the comment area – might cut down in irrelevant comments.