superann

This plugin filters the sitewide comments feed as well as individual post comment feeds.
Upon first-time installation and activation, all trackbacks will be removed from the default WordPress comments feeds. 
You can override this behavior on the options page and also use the comments or trackbacks only feeds described below.
URL for comments only feeds: add the variable “comments” to your feed query string.
<ul>
<li>http://mysite.com/comments/feed/?comments</li>
<li>http://mysite.com/?feed=rss2&withcomments=1&comments</li>
</ul>
URL for trackbacks only feeds: add the variable “trackbacks” to your feed query string.
<ul>
<li>http://mysite.com/comments/feed/?trackbacks</li>
<li>http://mysite.com/?feed=rss2&withcomments=1&trackbacks</li>
</ul>

Separate Feed Comments and Trackbacks

Remove trackbacks from your sitewide and individual post comment feeds, and/or have alternate feeds for comments or trackbacks only.

alecs.y

Twitter Trackbacks Bar is plugin to integrate tweets that mention your post into your blog. It separates the trackbacks and the pings of comments. Each tweet is comes with reply and retweet’s links to get more readers engaged in your conversation’s story. This plugin must be installed with WordPress’s plugin Topsy, that integrate your tweets in comments in your blog.

Twitter Trackbacks Bar

Twitter Trackbacks Bar is plugin to integrate tweets that mention your post into your blog. It separates the trackbacks and the pings of comments.

Separate Feed Comments and Trackbacks vs Twitter Trackbacks Bar