Add a Subscribe to MadMimi Checkbox after the comment form
Stops a post from from immediately being published on feed.
WordPress Toolbar (supports WPMU since v 2.2) is a unique plugin which automatically enables a toolbar for all outgoing links from your blog post, sim
Adds additional technical information to comment notifications, including referrer, User-Agent, and a lot more.
Comment Counter - Count comments by a commentator.
Allows you to expand and preview short URL's in comments, useful to detect spam or links to malicious sites before comment approval.
Posts comments without refreshing the page and validates the comment form using Ajax.
This plugin enhance the current activity stream on a BuddyPress user profile
Closes comments across the board to IP addresses that are behaving badly.
Rejects comments that contain BBCode or too many hyperlinks.
HGK Feedback Form plugin adds feedback (or comment) form to any page or post.
Use this plugin to get rid of commenters who just can't stop posting comments over and over and over and over...
Comment Image Embedder is a very simple plugin that, once installed, lets your visitors add an image to their comments.
A very simple plugin that prevents WordPress from automatically creating hyperlinks in the comments section.
Allow users to post source codes in comments using [code][/code] tag. No syntax highlight at the moment, it just replaces the special characters.
RSS link for this tag.