Note: This is not a free chess server
1-year Membership rates (correct from 16/2/10)
Another option is to buy Fritz or Chessbase - you receive free accounts when you purchase these programs.
Playchess.com is the online chess server of the popular chess playing program, Fritz and chess database program, Chessbase. The interface is the best looking of the bunch (looks like the latest Fritz/Chessbase interface) and has a host of features, similar to those of ICC.
To play on this server, you must download the playchess.com client interface.
Please contact me at email@example.com if there are any mistakes or new servers you would like me to add to this list.