Tran Ngoc Tuan Anh

This plugin adds rel=”nofollow” to all external links in post content. So, your flow of PageRank can not run to other websites and your blog’s SEO is improved.
The internal links are unchanged.
Requires PHP5.

External Nofollow

Keef

Opens external links (those to other websites outside of your own domain, eg., Facebook, Twitter, etc) in new windows.
There are no configuration options, simply install and activate.

Open External Links In New Windows

Opens external links (those to other websites outside of your own domain, eg., Facebook, Twitter, etc) in new windows.

External Nofollow vs Open External Links In New Windows