I am using the Offline KI on the Shard, which contains source code under the GPL license (version 3) not only written by me, but also by Sirius, D'Lanor and Dustin. To comply with the license, I need to make the version of the source code I am using on the Shard available.
Since I am using the master branch of the Offline KI, you can find the source code for what is distributed by the DI dataserver at https://gitorious.org/offline-ki/offline-ki .