http://www.phpbb.com/ - phpBB2 (PHP, mySQL)
http://woltlab.de/ - wbb1 (PHP, mySQL)
http://yabb.info/ - YaBB SE (PHP, mySQL)
http://openbb.com/ - OpenBB2 (PHP,mySQL)
http://www.invisionboard.com/ - (PHP,mySQL AND CGI)
http://german-bulletin-board.de/ - gBB (PHP, mySQL) (Cool)
http://www.phorum.org/ - Phorum (PHP + MySQL; open source)
http://www.minibb.net/ - MiniBB (PHP + MySQL)
http://www.yabb.com/- YaBB original (CGI)
http://www.mybboard.com/ - MyBB/DevBB (PHP, MySQL)
http://www.simplemessageboard.com/ - SMP (CFM, MSsql)
http://www.lokwa.com/ - lokwaBB (PHP, Mysql)
http://www.mercuryboard.com/ - MurcuryBoard (PHP, MySQL)
http://edge-programming.com/eboard/ - EBoard (PHP)
http://www.smartbb.net/ - SmartBB (PHP, Mysql)
http://www.icredibb.com/ - iBB (PHP, Mysql)
http://www.myboard.co.uk/ - myBoard (PHP, MySQL)
http://mybboard.com/ - DevBB (PHP, mysql)