The Mac’s most popular, probably the best, most feature laden, and now free, RSS reader. Handles HTML archives, integrates with Spotlight, iCal, emails web page, tabs, tabs, more tabs, as well as Instapaper support, and Twitter search.
NetNewsWire has a familiar three-paned interface and can fetch and display news from thousands of different websites and weblogs.
9WR – NetNewsWire: RSS newsreader, tabbed browser, three-pane interface, HTML archive, integration.