The kappaBox is a WiFi-N router capable of communicating with Zigbee devices. It serves as a gateway to connect all devices to the internet. KappaBox is running on Linux.
The kappaSDK is the main tool used to build server-side applications that run inside the kappaBox. It is shipped with a cross-compiler and all the neccessary APIs for you to make use of the on-board zigbee module.