World Mahjong Players Association (WMPA) - An initiative of the Korean based software company TankSoft. Nonprofit organization for promoting Mahjong. Hosts online games and organizes world-wide tournaments with money prizes. In Chinese, English, Korean, and Japanese. - http://www.wmpa.net/
National Mah Jongg League (NMJL) - Represents American Maajh players since 1937. Publishes a new set of hands each year. - http://nationalmahjonggleague.org/
Hungarian Mah-jong Association - Organizes competitions in Hungary. Member of the European Association. - http://www.mahjong.hu/
European Mahjong Association (EMA) - Encourages, disseminates and coordinates the playing of Mahjong in Europe. - http://mahjong-europe.org/
Mahjong Denmark - News about activities, events and championships organised by the Association of Danish Mahjong Players. Chinese Official International rules in PDF. Summary of Modern Japanese scoring. - http://uk.mahjong.dk/