Erunafailaro

This plugin is intended to make the comment-moderation for the blog-owner a little bit easier. It does not detect comment-spam on its own. To successfully prevent spam, it should be used as an addition to the spam-protection provided by Akismet and Spam Karma.
This plugin adds a small button to every comment. This button will only be visibly to a logged-in blog-admin (that is a registered user with a user-level of 10).
When you press this button, the URI of the commenter will be replaced by the URI you can specify at the plugin?s option-page.
<h3>Plugin Homepage</h3>
The complete documentation is located at my website: http://www.weinschenker.name/comment-url-control/

Comment URL Control

This plugin will allow you to remove an unwanted author-URI entered by a commenter with one single click of your mouse.

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.

Comment URL Control vs Remove Pingback-Trackback Comments