WordPress Plugins : DoFollow 4.0
This is a plugin for WordPress. It will disable the automatic rel="nofollow" attributes added to external links. You may want to do this if you have good spam filtering for your comments, or if your blog is moderated.
Optionally you can also set a comment age limit for adding the attributes, or have them removed differently from comments left by registered users and other visitors.
Pingbacks and trackbacks are just different types of comments in WordPress. This plugin will take care of all of them. You can also choose not to remove rel="nofollow" from some types of comments.
Download: dofollow.php
Requirements
WordPress 1.5 or later (including 2.x).
Installation
Download dofollow.php and save it in the wp-content/plugins directory of your WordPress installation. Activate the DoFollow plugin in the Plugins admin page.
Once activated, the plugin provides a DoFollow subpage in the Options page. It will show you the current operating mode in addition to the configuration options.
This plug-in was the first and still essential way of riding your WordPress site of nofollow.
Download, install and come join the “dofollow” community!