Most interesting in RSS Tools

Free
Read RSS/Atom news feed data on your Mac.
Free
It is the flagship, open source blog and feed aggregator.
Free
Unison gives you virtual meeting rooms where you can IM, post updates or documents, and talk live whenever needed.
Free
Collects the latest news from your favorite websites, RSS feeds, blogs, etc.
Free
Store news articles, videos, and images in one place.

Top rated in RSS Tools

UseNeXT
Free

UseNeXT offers lightning fast access to over 60,000 Usenet discussion boards.

RSS Notifier
Free

Adds RSS newsletter elements to the Notification Center.

RSS Bot
Free

Keep track of your RSS feeds directly from your desktop.

Leaf - The News Reader
Free

It helps you enjoy your daily news and easily manage your subscriptions.

Feedly
Free

Collects the latest news from your favorite websites, RSS feeds, blogs, etc.

MacSOUP
Free

Offline reader for Mac. It handles news and mail (but it can optionally interface to Eudora or Claris Emailer...

NewsFire
Free

Filters and manages various online newsletters.

ReadKit
Free

Keep track of the latest news directly from your desktop.

Vienna
Free

Read RSS/Atom news feed data on your Mac.

Gruml
Free

View and manage your feed subscriptions of your Google Reader account on Mac OS X.

Unison
Free

Unison gives you virtual meeting rooms where you can IM, post updates or documents, and talk live whenever needed.

Reeder
Free

Google Reader Client. Syncs with Google Reader.

NetNewsWire
Free

Best way to keep up with the sites and authors you read most regularly.

Pocket
Free

Store news articles, videos, and images in one place.

BibDesk
Free

Bibliographic reference manager for OS X.