Gitifier is an application that runs in your MacOSX menu bar () and monitors Git repositories that you're interested in. When someone pushes a new commit, it shows you a Growl notification. All Git repositories are supported - whether it's on Github or Gitorious, private or public.
![Gitifier: Git commit notifier for MacOSX](https://cdn-ak-scissors.b.st-hatena.com/image/square/2eb6619ae4f78cec206c0ecf904c2d406a616b05/height=288;version=1;width=512/http%3A%2F%2Fpsionides.github.io%2FGitifier%2Fscreen-commit.png)