Account handling, authentication, custom fields, SSO & password reminders. Done.
Complete integration with other modules for user avatars, locations, chat history and more.
Integration with Facebook, Twitter and Open ID. Make your app sociable.
Apps using the users module:
User Groups - manage and tag user groups to segment your audience and data. Manage user data in your app or through the admin panel.
Background syncing and other typical user tasks managed automatically. Reminders and other technical messages sent to the user via Messaging module.