MSN Games by Zone.com
Looking for some real, live competition in free online gaming? If so, this site is hard to beat. Microsoft's cutting-edge gaming center is the biggest resource of its type on the Web, with over 18 million registered users. Membership is free. Games here include classics such as backgammon, bridge, checkers, chess, cribbage, go, hearts, reversi and spades.
* Zone.com offers a much-improved interface, which features a real-time display of the number of people playing different games. This feature makes it easier to locate opponents to compete against.
* Among Zone.com's more helpful features is its free ranking system, which shows you how you stack up versus the competition.
* Note: Zone.com doesn't work with Netscape. (yes it does)