Elf is an Internet-based tool for keeping track of what's due, overdue and ready for pickup. Users can keep track of one or more library accounts in one place and receive reminders (sometimes called pre-overdue or early notification). Reminders are sent when the user wants it -- before items are due (up to seven days advance notice, weekly notice or everyday reminders). For families or anyone who'd like reminders before an item is due (user-selectable number of days notice). If Elf is for you, sign up for an account.