This is a Debian prepackaged version of the oneko screenhack.

The original source for this package was obtained from:

      http://www.daidouji.com/oneko/distfiles/oneko-1.2.sakura.5.tar.gz

The (Japanese) README file, as well as the LSM file originally distributed
with oneko on sunsite both say that oneko is public domain software.
The original xneko was written  by Masayuki Koba and modified to oneko by
Tatsuya Kato.