szehau

Default Trackbacks is a wordpress plugin that sends trackback to the preset URLs. It is enhanced version of the old Default Trackback.
Features:
<ul>
<li>Send trackback to the URLs in the list when a post status is changed from “any” to “publish”.</li>
<li>Configure the trackback URLs under WordPress?s admin setting page.</li>
<li>Default setting for sending trackbacks (to send trackbacks by default or not each time publish a post).</li>
<li>Option to override default setting above at edit/new post page.</li>
</ul>

Default Trackbacks

This plugin will send trackbacks to URLs in the list ONLY when user publish a post or change the post status to publish.

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.

Default Trackbacks vs Remove Pingback-Trackback Comments