Free EventBox from MacHeist
Scroll down the page and you’ll see the download link.
I’ve been using EventBox for months now, and it’s a great app for anyone with multiple social network profiles who would like to see them all in one place. I use EventBox mainly for Twitter and GoogleReader.
It’s still in beta, so you might notice it’s a little rough around the corners if you really use it like I do; as your main RSS reader and Twitter client with hundreds of new “events” a day. It’s in active development so it gets more polished with every update.
