Reeder, Silvio Rizzi's well-regarded RSS feed reading app, just received a major update for Mac, and is now available for purchase on the Mac App Store.
Reeder, which first made waves on iOS, has been a Mac App Store staple for quite some time now. The latest version, Reeder 3, is priced at $9.99, but it's a free update for Reeder 2 users.
I've been testing out Reeder 3 in beta for a few months, and I can assure you that it lives up to the hype. If you're still into RSS feeds in 2015, then there is perhaps no better app for the task than Reeder 3.