This is part of the azurecurve ClassicPress Plugins which introduces the plugins I have available for ClassicPress.
The plugin I am going to cover in this post, is an existing one which has been brought up to coding standards; RSS Suffix.
The RSS Suffix allows the site admin to define a suffix which is appended to every entry in an RSS Feed; replacable parameters can be used to, for example, allow each article to include a link back to itself.
Take a look at this sites RSS Feeds using the RSS buttons in the Social Media & Other Sites section on the sidebar.
The plugin can be downloaded via my Development site.