Bird Bell…Find out when your followers:

• Favorite your tweet
• Retweet your tweet
• Follow you
• Unfollow you
• Add you to a list

The app lives in your menu bar and gives you instant Growl notifications so you always know what’s happening on your twitter stream.

Bird Bell is a great addition to your favorite Twitter app, notifying you of the things that most Twitter apps don’t, including unfollows!