This plugin will add avatars of comment-authors to the comment-feeds of your WordPress-Blog.
Pings some Norwegian and international ping service.
This plugin will send trackback to Blog Portal or Blogtal (www.blogtal.com) ONLY when user publish a post or change the post status to publish.
Easily separate comments from trackbacks and pingbacks
Prevents trackbacks and pingbacks from showing up as comments on posts.
This plugin will allow you to remove an unwanted author-URI entered by a commenter with one single click of your mouse.
This plugin will send trackbacks to URLs in the list ONLY when user publish a post or change the post status to publish.
Add the option for a pingback notification to go to an email other than the site admin email.
Disable posts, comments, feeds, and other blogging features. A must-have plugin to turn WordPress into a non-blogging CMS platform without code.
Globally disables trackbacks to cut down on spam. Very, very few people legitimately use trackbacks and spammers love them, so it's worthy tradeoff.
Show your comments on other blogs.
Provides custom recent comments widget with extra features such as display avatar, comment excerpt and much more!
Follow Self Pings
A more seamless approach to deflecting the vast majority of SPAM comments.
Displays trackbacks and pingbacks which belong to the currently displayed page in a widget.
Light and invisible method to block auto-spam when a spam comment is posted. Pings and trackbacks check for real backlinks.
Notify a user about when he sent comment or form via Contact Form 7 and automatically blocked spammer IP by notifier users.
You can ban suspicious traffic from accessing your website or redirect visitors to a specific page.
Pingcrawl adds a "Possibly related posts" capability by querying Google Blog Search for post tags and pinging the results. Limits are configurable.