Comment by rufibarbatus

.cat is registered by Catalan organisation puntCAT. According to Wikipedia, its intended use is to promote the Catalan language and culture, these pages notwithstanding:

http://nyan.cat/ http://lol.cat/ http://crypto.cat/ (hey, at least it has a Catalan version)

puntCAT can be found at: http://www.puntcat.cat/