www.newsgator.com/individuals/NetNewsWire (to download a trial version or to purchase.)

NetNewsWire is a desktop news aggregator for Macs featuring a three-paneled interface similar to an email client.  NetNewsWire synchronizes your clippings with the NewsGator Online web-based reader and other NewsGator readers.

NetNewsWire Lite is a free, basic news reading version of NetNewsWire that does not includes some of the advanced features.

The full version is $29.95.