I use NetNewsWire Lite to keep up with my blog feeds, though I’ve never felt the need to upgrade to the full version. Now, however, the full version of NetNewsWire is being released for free as its developer focuses upon growing their online services. So, if you you’re running Mac OS X 10.4 or later you can grab the latest version and take it for a spin.
More information at: RSS Reader for Mac – NetNewsWire
(Of course, I’m still stuck in 10.3.9 for the foreseeable future [anyone want to donate me a MacBook?:-)] and will be plodding along with the old Lite version just fine.)