Affiliated Horikoshi Dojo:
Aikido Horikoshi Dojo (Japanese Language):
http://www.horikoshidojo.com/

Aikido Association of Iran:
http://www.aikido-iran.com/

Seimei Aikido Club of St. Petersburg, Russia:
http://www.seimei.spb.ru/news.php

Aikikai Foundation—World Headquarters for Aikido:
http://www.aikikai.or.jp/eng/index.htm


Other Organizations:

Tricks 4 Kidz Gymnastics School (Aikido Holland Dojo's training facility) 
http://tricks4kidz.com/