Committed is a great way to be notified when someone pushes new code to the GitHub repositories you care about. Committed notifies you using OS X's new Notification Center feature when someone pushes code. Committed works with any repository you are watching on your personal account as well as any repositories you have access to in your GitHub organization.
Be notified when repositories you are watching on GitHub receive a new code commit.
Quick access to the diff information of each commit.
Choose which specific repositories you want to be notified about.