Google Apps Improved Login (GAIL) provides Google Apps administrators with two oft-requested features: the ability to customize the login page and the ability to log in as their users. GAIL is designed to run on Google's App Engine so that administrators do not need to have their own Web server. GAIL works by making use of the SAML Single Sign-On (SSO) Service for Google Apps. Premier and Education Editions of Google Apps are supported. Standard Edition is not.
Google Apps Manager (GAM) is a command line tool that allows Administrators to control their Google Apps domain and accounts. With GAM you can create users, turn on/off services for users like POP and Forwarding and much more. It requires Google Apps Education or Premier Edition. Standard Edition is not supported. Future plans for GAM include even more management capabilities as well as a graphical and Web-based interface.