WP Plugin: WordPress Notification Plugin is a WordPress plugin that allows registered users to choose to be notified of any new posts or comments on your blog. It will add a new personal option to their profile where they can choose: No notification, Notify of posts, Notify of comments, or Notify of posts and comments.

WP Plugin: Comment Timeout Reduce comment spam by automatically disabling comments on older blog entries after a certain period of time. Comments on ongoing discussions can be kept open.

WP Plugin: Comments Post Rewriter Prevents spambots sending their POST request to wp-comments-post.php by inserting a “authentication” code with JavaScript into wp-comments-post.php and writing it back to e.g. wp-comments-post.php?code=xxxxxxxxx. By xxxxxxx is a daily changed hash of several “server-unique” data. Now with an options page in your admin area and a binding to the SK2.