This plugin does exactly what the title says, displays content related rss feeds. Takes the most relevant keywords from the post content and goes and finds feeds containing those keywords, and does that automatically, without the need of manually searching for appropriate feeds, all you got to do is install the plugin and choose where you want the feeds to be displayed. Great for Search Engine Optimization.

Plugins Page | Download

Content Related Rss Feeds, WordPress, Plugins, WordPress Plugins