Get the Most Out of Google Reader
Google Reader Reviewed
Google Reader is a decidedly simple yet very usable and, thanks to a flexible labeling system, quite comprehensive web-based RSS feed reader.
GROSX (Google Reader for Mac OS X)
GROSX (Google Reader for Mac OS X) integrates Google Reader with Mac OS X by making it the default feed reader, announcing new items through Growl, and by providing easy access and preview from the menu bar. (Mac)
Reader Notifier - Google Reader Notifier
Reader Notifier puts Google Reader in your Mac OS X menu bar, complete with headlines, following links and marking items unread. (Mac)