A chat robot.
The italian translation of this page
There are several chat bots that are either in use by Semantic Web developers or use Semantic Web technologies
IRC Bots
ChumpBot -- used in #swig on irc.freenode.net. Powers http://swig.xmlhack.com
phenny -- used in #swig on irc.freenode.net. Wordnet lookups, etc
Calbot -- Julie + calendaring
Emeka -- remoting querying of RDF resources, inspired by Julie and phenny
FOAFBot -- provides access to a knowledge base created by spidering FOAF files
Jabber Bots
who-ist -- connects FOAF and WITW