Feedlist - a wordpress plugin that displays linked lists imported from an RSS or ATOM feed
Feedsmith - redirects all RSS feeds on a Wordpress blog to the Feedburner feed.
Fedafi RSS plugin - a plugin for Wordpress that creates a full text valid RSS 2.0 feed from your Wordpress blog and adds a style sheet, tracks subscribers and clicks on articles.
BDP RSS aggregator - converts RSS feeds to Wordpress blog entries. Handy for creating an automatic blog.
Sig2Feed - Wordpress plugin that lets you add a signature to your RSS feeds