HealthWorld Online Qigong and Taiji*Cool Site* - In depth resource on qigong and taiji (chi kung and tai chi). Articles on guidelines for practice, choosing your path, practices, online forums.
Wikipedia - Nei chia - Overview of Nei Chi, internal Chinese arts. Details on the history of the term and styles that are a part of it.
World Tai Chi & Qigong Day - List of events worldwide, medical research information, FAQ, mail list and organizing kit.
Internal Strength Magazine - An online version of the newsletter published by Mike Sigman from July 1993 to May 1994 offering commentary and articles related to martial arts using "internal strength".