NetNewsWire is a great RSS client for OSX. It was acquired by NewsGator in late 2005, and since then has continued to improve and be awesome-r.
And now, it’s free, along with NewsGator’s other consumer products, including a RSS client for Windows, an RSS Outlook plugin, and a RSS client for some PDA platforms. NetNewsWire creator Brent Simmons is very pleased with this new direction.
I’ve been a happy paying user of NNW since early 2005, and it’s very cool that more people will be exposed to it from now on.