The RFXtrx868XL is supported by:
Domoticz
Domoticz is a Home Automation system that lets you monitor and configure various devices like: Lights, Switches, various sensors/meters like Temperature, Rain, Wind, UV, Electra, Gas, Water and much more. Notifications/Alerts can be send to any mobile device.
DomotiGa
DomotiGa is Open Source Home Automation Software from the Netherlands. It is written in Gambas Basic and runs on Linux.
EventGhost
EventGhost is an advanced, easy to use and extensible automation tool for MS Windows
Homeseer
HomeSeer HS3 is an advanced home automation and remote access software package works with a wide variety of hardware. Once installed, you'll be able to monitor and control your home from any Web browser (locally or remotely) via computer, PDA, PocketPC, or cell phone.
Indigo Domotics
Indigo is an intelligent home control server that integrates an assortment of home control hardware modules to provide unprecedented control of your home.
Documentation:
The RFXtrx User Guide is available on the Downloads page
HS code: 8526 92 00 90