Akismet checks your comments against the Akismet web service to see if they look like spam or not

Out-of-the-box SEO for your Wordpress blog

cforms II offers unparalleled flexibility in deploying contact forms across your blog

Plugin to show a link to the last post from the commenters blog in their comment

Forwards all feed traffic to Feedburner while letting through some important User-Agents

This generator will create a sitemaps.org compliant sitemap of your WordPress blog

Automatically applies a distinctive style to comments by the post’s author

Allows readers to receive notifications of new comments that are posted to an entry.

Very fast cache module.

Track your blog stats

Generate a related posts list via tags of WordPress 2.3

Allows you and your users to edit their comments inline