DoubleChessBoard - Software download for Bughouse chess. - http://bughousechess.wz.cz/DoubleChessBoard/
Sjeng - An attempt to create a bughouse and crazyhouse playing program that can attain a level comparable to the best human players. - http://sjeng.org/
Sunsetter Bughouse Engine - A program that plays chess and crazyhouse chess (single board bughouse) on internet chess servers, released under the GPL. - http://sunsetter.sourceforge.net/
Bughouse Strategy from Errant Fischer - Top ten ways to tell you have a bad bughouse partner, and other strategy hints and annotated bughouse games. - http://personal.atl.bellsouth.net/f/e/ferrantc/chess/
Bughouse in Europe - Information about bughouse and bughouse gatherings in Europe. - http://www.bughouse.info/
Tandem Chess and Bughouse - Bughouse rules and strategy, as well as information about playing by email. - http://www.chessvariants.com/multiplayer.dir/tandem.html
NonVi Games - Makers of Double Chess, a program for PalmOS and Windows for playing bughouse and regular chess. Includes product information and demos. - http://www.nonvi.com
Bughouse Chess - Bughouse in java, for beginners. - http://www.pathguy.com/chess/Bughouse.htm
Bughouse.net - Rules, openings, strategy, rankings, and tournaments for a chess game in which two boards are used and four people can play. - http://www.bughouse.net/