svd-xbee - separates out the API component and is aimed at being a more solid and tested module for working with XBees
Digi's xbee modules are good for quickly building low power wireless networks. They can be used to send/receive text data from serial ports of different devices. XBees can also be used alone for their on board digital and analog I/O capabilities.
svd-xbee is a high level, actively maintained fork of Richard Morrison's node-xbee. It talks the ZigBee API with XBee radio modules over serial connections and provides high level abstractions of the XBee's functionality.
GitHub page: https://github.com/jouz/svd-xbee