RSS MAD is the largest archive of RSS feeds on the internet. We have all your favorite news, blogs, posts, and anything else that can be viewed via RSS in one convenient place
gfeed is a gtk+-2.0 based RSS/RDF feed reader. It currently supports most basic RSS/RDF feeds that do not include html. It is not designed to be an aggregator but a simple, light reader to be integrated into your desktop.
immedi.at helps you to keep track of online information as it changes. It sends you an instant message whenever any RSS or Atom feed you want to monitor changes.