Stackoverflow 비슷한 시스템 목록

http://www.osqa.net/
http://www.question2answer.org/
http://askbot.org/en/questions/
http://qato.com/
http://shapado.com/
https://github.com/anantgarg/Qwench
http://code.google.com/p/soclone/
http://sourceforge.net/projects/cahoots/
http://sourceforge.net/projects/phpancake/
http://code.google.com/p/stacked/