Feedsnap is a very simple plugin that will render an RSS feed to your post.
<h3>Useage</h3>
Enter the following in your post [feedsnap]feedurl[/feedsnap] where feedurl is the url of the feed you wish displayed.
Example: 
[feedsnap]http://forums.digitalpoint.com/external.php?type=RSS2[/feedsnap]

FeedSnap

Feedsnap is a very simple plugin that will render an RSS feed to your post.

frenchsquared

This plugin will add items from an rss feed to your blog. 
The items will show after the content on your single post. 
The will pull new content every time the page loads thus 
helping with Google Rank since you will have new content on your 
single post pages.
Enjoy! 
 Gordon French

RSS to Post

RSS-to-post will add a items from an RSS Feed to the bottom of your post content.

FeedSnap vs RSS to Post