Adds Whitelist and Blacklist options for Trackbacks and Pingbacks
Prevents trackbacks and pingbacks from showing up as comments on posts.
Displays trackbacks and pingbacks which belong to the currently displayed page in a widget.
MP Spam Be Gone is the simplest, most effective Spam blocker.
Pingcrawl adds a "Possibly related posts" capability by querying Google Blog Search for post tags and pinging the results. Limits are configurable.
Pingback Killer disables all of WordPress' pingback functionality.
One step process to remove pingbacks and trackbacks and leave only real user opinions in your posts comments.
Stops self pingbacks and trackbacks on own posts and pages.
Provides a Twitter retweet button for your posts that shows all tweets, enables retweeting, and adds tweets as comments.
Easily control who can comment and when they can comment on any post type.
Remove trackbacks from your sitewide and individual post comment feeds, and/or have alternate feeds for comments or trackbacks only.
Hides metabox controls on the write/edit post & page admin screens for each user role. Also controls autosave, trash time and saved revisions.
Comment spam blocking plugin that blocks 100% of the automated spam with zero false positives.