We are rolling out a new version of the Google bar for Google Apps users. This is designed to be simpler and more consistent with Android and Chrome OS. It includes notifications, a Google+ share box (if Google+ is enabled), and a new App Launcher with links to other Google products.
Google Apps users will have easy access to all the Google Enterprise products they care about. Google services that are not enabled will not be shown in the App Launcher. Marketplace apps will be listed under the More section in the App Launcher.
For more information:
Google Apps, Google Apps for Business, Education and Government