NewsRack

NewsRack is a powerful RSS reader for Mac OS X that can be fully synchronized with your Google Reader account, including the ability to edit your feed list from within the app.

It offers a keyboard-friendly, tabbed interface that stays out of your way, so that you can focus on the news and blogs you care about.

NewsRack is also available for iOS.

Features

Sync with Google Reader...
Not just your unread articles, you can also add feeds, change their titles or rearrange them in categories, all without leaving the app.

...or Don't.
Sync is optional, so you don't have to set up a Google account to read your feeds. You can also use NewsRack as a standalone app.

Tabbed Interface
The tabbed browser allows you to read linked websites without leaving the app. You can also use tabs to keep an eye on multiple feeds.

Thumbnail Previews
Image previews in the article list allow you to quickly find interesting posts – great for photo blogs and web comics.

Drag'n'Drop Feed Management
Easily rearrange your feed list, add categories and new feeds – all synced with Google Reader.

Keyboard-friendly
Power users welcome: Navigate your feeds without taking your hands off the keyboard. A convenient shortcut overview is included.