RSS readers - OS X

- RSS reader for OS X
NetNewsWire - Newsgator’s RSS reader for the Mac comes in two flavors: commercial and free
PixelNews - a commercial Mac OS X RSS reader that comes with a huge database of feeds
Shrook - a Mac RSS reader which also has a web based version; supports synchronization, instant notifications via Growl, real time search, smart grouping and more
Vienna - a freeware, open source RSS/Atom newsreader, with a built-in tabbed browser and the ability to customize feed display
NewsLife - RSS reader for the Mac, pleasing to the eye, simple and easy to use
Squeet - another Mac RSS reader, currently on hiatus