Open source ZigBee implementation

open-ZB is an open source implementation of the IEEE 802.15.4/ZigBee protocols. Apparently the website has been around for over a year, but not sure how long the implementation has been made available. It doesn’t seem like there’s a sizeable community using it, so if you are thinking of using the code, don’t expect to receive much support should you find out later on that the implementation does not work the way it should be. So far I’m yet to see any credible documents reporting on the use of this implementation, so it’s difficult to know how stable the protocol stack is. Perhaps it’s still early stage?