WP plugin for clickbank

Does anyone know what wp plugin is this blog ( http://blogstones.com/allen-iverson...vivid-pictures-of-things-that-make-him-happy/ ) using to automatically hyperlink keywords to clickbank offers?

Thanks!

 

Wp Affiliate, easy wp affiliate, wp affiliate elite are just a few that offer this feature

 

maxblogpress ninja affiliate

 

Also check this out:
http://www.lmgtfy.com/?q=wp+affiliate

 

I think it's this one - hopPress
http://wordpress.org/extend/plugins/hoppress/

I just saw it in the new wordpress plugin listings the other day.

 

You can also do this with alinks, but I've found that the plugin can make your blog slow.

 

I'm using this plugin for that job: SEO Smart Links

 

yes i am using seo smart links aswell, its the easiest way to do it.

 

are most of the plugins named here free?

 

There are lots of clickbank plugin for WP,but NOT FREE
If you just want to link some keywords to a CB offer, you can try "alink" plugin