WatchMyBack24 is a powerful spamfighting plugin against comment or trackback spam.
Chat Meets Blog - A Love/Chat Relationship. An IRC web client for your blog.
This plugin gives wordpress the ability to strip comment text of breaks, p's, nl's, and white spaces before and after comment text before being writte
Allows you to display a captcha on your comment form to avoid spam.
This plugin have two features mainly. One you can send comments in AJAX. Second you can reply others' comments.
Count the number of comments for each post
This Plugin allows your users to easily fill out your comment forms using an hCard.
Add license terms to your comment form.
Add Jambis comments to your WordPress blog posts. If you want to exclusively use Jambis comments you may want to disable your WordPress comments. Unde
The LCA Plugin allows commenters to upload and display an avatar based on either name, e-mail address, url or a combination of all three entered.
Wavatars will generate and assign icons to the visitors leaving comments at your site. It can optionally show Gravatars as well.
Parses the content of pinged pages looking for the hReview format to supply better information on the opinions of the author.
Replaces <lj user="username"/> and <lj comm="community"/> with correct HTML code.
Easily separate comments from trackbacks and pingbacks
Ajaxify commenting with the MooTools JS Framework- mootools.net
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