Just about the best board game I've ever played - and I've played a few, I can tell you. (Including Cheapass stuff.) When I first bought it, in 1999, we played it in my flat about twice a night, three nights a week for about four months. The amount of levels of strategy we evolved through in that time was ludicrous. Even now I could do with playing it maybe a few times a week.

I own the Seafarers and Six-Player expansions but I haven't played Seafarers that much. Both expansions were a revelation, however. Being, as it is in my opinion, the tightest-designed game I have ever seen, I was sceptical that any designed after the fact expansions could really add much to the game. In this I was glad to be proved wrong. Six player really makes the game a lot of fun with the minimal addition of rules (two!) and removes the frustration of having to play with a small number of players. I've only played the Greater Catan variant of Seafarers but it adds whole new levels of strategy to the game which I already stated I considered almost impossible to do. It also revalues what we had already determined to be the two least valuable resources in the game in a way that adds interest to the game as well as making intuitive sense.

My stuff
Online Settlers Game a work in progress done in ASP and JavaScript.
External Links

Online Settlers

Java Version. Pretty good, very complete. Only four player standard games and the bots AI isn't very good but there are some good human players out there.

Catan Is Wicked !!!!!

Online forum for Catan players.

Mayfair Games

The makers of the English Language version of Catan.

Official Catan Site

As it was originally a German game, this site is in German.

GameReview - The Settlers of Catan by Klaus Teuber

Shroom's Settlers of Catan Resources