Adding to the pile of Extra Future [6-hour projects][hour], I present to you: [Tybor, a Markov chat bot][link]. He is a chat bot based on the Hailo perl package, with a custom retro-styled HTML5/CSS3 interface written by me.
He also has a jabber account, which Google Talk/Google Apps users can talk to by adding the user *tybor* at *extrafuture dot com* to their contact list.
[link]: http://extrafuture.com/code/tybor/ “Tybor”
[hour]: http://extrafuture.com/tag/6-hour-projects/ “6 Hour Projects”