mikegogulski

Pingcrawl aims to replicate WordPress.com’s “Possibly related posts” capability. It queries Google Blog Search for related blog posts (based on tags, or the post title if there are no tags), tries to verify that they are pingback/trackback compatible sites and, if so, adds links to such posts to the end of each blog post where it is invoked.
Scope-limiting configuration options are included to enable Pingcrawl to fit any WordPress installation’s memory/execution time budget.
<h3>Licence</h3>
Pingcrawl is free software released under the GPL. If you find it valuable, you’re invited to make a <a href="http://www.nostate.com/support-nostatecom/" title="Donate with PayPal, MoneyBookers, etc." rel="nofollow ugc">small donation</a> toward its ongoing support and maintenance.

Pingcrawl

Pingcrawl adds a "Possibly related posts" capability by querying Google Blog Search for post tags and pinging the results.

Blogestudio

Pau Iglesias

When your blog posts receive pingbacks and trackbacks usually they are displayed together with user opinions.
But if you don’t like to see this additional data, or you think pingbacks and trackbacks are not valuable for your blog, here is a tool to remove them.
This plugin allows you to delete all pingbacks and trackbacks comments from your blog, leaving only user comments.
Furthermore turns to closed the ping status of existing posts still allowing new notifications, avoiding them future pingbacks or trackbacks.
And for new posts, to avoid more notifications, updates the default post ping status value to closed (this option is available in Discussion Settings section).
Full support for any kind of custom post types. There is a filter for developers if you want to exclude a particular post type.
This plugin provides a single one step form to do these changes, but previously it’s strongelly recommended you perform a database backup.
Once completed this process, you will not receive more pingbacks or trackbacks unless you do not change posts or blog notifications configuration.

Remove Pingback-Trackback Comments

One step process to remove pingbacks and trackbacks and leave only real user opinions in your posts comments.

Pingcrawl vs Remove Pingback-Trackback Comments