http://www.playcatan.com http://www.playcatan.com had a pretty good client... too bad it's not open for new registrations any more. They have Catan Universe now

http://www.playcatan.com http://www.playcatan.com had a pretty good client... too bad it's not open for new registrations any more. They have Catan Universe now instead - not sure how good it is, though.