This plugin allows you to add Facebook,Twitter-like @commenter name in comments reply
Automatic 1. In the admin panel plugins page click Add New 2. Search for SB @Reply comment 3. Find SB @Reply comment in the list an click Install Now 4. Click OK when prompted 5. Enjoy! Manual 1. Extract sb-reply-comment.zip to your wp-content/plugins directory. 2. In the admin panel under plugins activate SB @Reply comment. 3. Enjoy!