Free Software: NetNewsWire

NetNewsWire is a free RSS/Atom Reader that easily brings the news from your favorite sites right onto your Mac. The interface isn't as cluttered as other apps, such as Shrook, and is easy to navigate. It also has some great features, such as being able to use a desktop blogging app to respond to a post, change the way an article is displayed to you, and easy organization of your feeds. Definitely give it a try. Download it at Newsgator's website