I came across a fantastic little plugin the other day called Trackbackers. Written by Michael Wales, this plugin will list the top domains which have linked to you. It’s very similar to the top commentators list except this plugin lists all the blogs which have been linking to your articles (generated via the trackback list).
You can set the number of sites which are listed in your top list too.
Not only is this a fantastic way of rewarding blogs which have linked to you, it’s also a great way of encouraging others to link to your posts as well.
Link : Trackbackers WordPress Plugin