http://www.pathguy.com/chess/ChessVar.htm
United States Chess Federation (USCF):
http://www.uschess.org/images/splash-homepage/splash.php
New Jersey State Chess Federation (NJSCF):
http://njscf.org/
Chinese Chess:
http://www.chessvariants.com/xiangqi.html
Applet:
http://www.geocities.com/SiliconValley/Grid/6544/cccintro.htm
Gothic Chess:
http://www.gothicchess.com/
Yahoo Chess:
http://goo.gl/uXqm7
Free Internet Chess Server:
FICS