RSS feeds are a great way to keep up to date with the latest news and blog posts without the need to manually visit a large number of web sites throughout the day. NetNewsWire is a free RSS reader that can be used to subscribe to RSS and Atom feeds.
The program can be used as an aggregator in its own right, but if you already use Google Read to access feeds, you also have the option of synchronising NetNewsWire with your Google account.
News items you would like to save can be exported as HTML files, and you also have the option of sending items to Instapaper for later reading. Any podcasts you subscribe to can be automatically downloaded and transferred to iTunes so they will be available on your iPod or iPhone.
A large number of feeds can become difficult to manage, but NetNewsWire includes smart lists that can be used to filter news items based on various criteria. With thousands of indexed feeds available within the program for you to subscribe to, integration with Twitter, del.icio.us and Growl, NetNewsWire is a highly flexible news aggregator.