www.eudesign.com/chessops
www.chessgames.com/index.html
www.chesscafe.com
www.chesstactics.org
www.365chess.com
But the chess site I spend the most time at is Red Hot Pawn. Although I actually use www.playtheimmortalgame.com since I don't want to go blind.
Edit: removed the url tags since they don't seem to work here.
www.chessgameslinks.lars-balzer.info/
www.geocities.com/alekhine_gotw/ This used to have good gamediscussions on the message board,now it's polluted by ads.Rest of the site is still cool though.
http://members.aol.com/manusfealy/index.htm
http://www.beginnersgame.com/ This always makes me smile.
http://www.rci.rutgers.edu/~goeller/urusov/perreux/index.html Very nice site about the two knight's defense.