FightingDirectory.info is a great resource containing links related to Chinese martial arts, Korean martial arts, Japanese martial arts, martial arts services, aikido, karate, taekwando, muay thai, chung moo doe, tang soo do and more.
NinJutsu and Asian Culture Research Center
Official branch of the Koka Ryu Ninjutsu School - Shiga Japan Asian Culture Research Center
http://www.toushinkai.com/
Information on both traditional and non-traditional types of Ninjutsu, Jujutsu, Aikijutsu and Capoeira. Contains dojo details, locations, events, seminars, instructor profiles, photo gallery, links and store.
Articles, training videos, and seminars dealing with Tew Ryu Ninjitsu, an American ninjitsu system in a non-traditional program. Also sells martial arts supplies.
Based in Wausau, Wisconsin. Martial arts as a tool for self-protection and a vehicle for personal development. Class information, instructor bios, and articles.