BjkNinja.com -- Chris Carbonaro Shihan's dojo site. Excellent information, store, and clips.
Book recommendation: Beginning to Intermediate Taijutsu by Shihan Joseph Adriance. Strong recommenation by Shidoshi Jeramis McFadden: "I have had the honor to both train and travel with Shihan Joseph Adriance in Japan. He is a man of deep thinking and represents a warrior in the purest sense. The material is presented clearly with photos and text that not only shows techniques from the Bujinkan but also philosophy and life practices of the warriors of Japan. I would consider this manual to be an essential part of any martial arts library."
Onibujin -- Downloads of current instruction from Japan. Dojo listings. Shihan Phil Legare's site. Great forum. Web store. Training articles. His video downloads from Japan are excellent, and seminars with Phil Legare and Michael Pearce are very highly recommended.
WIN -- Online store, Bujinkan Yellow Pages, and more. Strongly recommended for networking within the Bujinkan -- best Bujinkan Yellow Pages I've seen.
Living Values -- Jack Hoban Shihan's site for his dojo and organization out of New Jersey. Articles. Virtual Bookstore. Comprehensive site. Well worth spending some time viewing.
Bujinkan Ohoko Dojo -- Ron Blackwood Shihan's site for his dojo in Orange, CA. ( Los Angeles area.) Blackwood Shihan not only was strongly recommended by Legare Shihan to those of us at the 2006 Shinkengata Summit, but also played a part in making the introductions that resulted in the formation of this site. And Ron is one of the coolest shihan I've met.
PAART -- Handmade wooden training weapons. Good quality. Excellent prices. Located in Croatia (Europe).
Bujinkan Hombu & Ayase Classes -- Japan. Lots of great information on Soke Hatsumi's studio and training in Japan. (Please do not e-mail the site's admin without first exploring the entire site.)
Tim Bathurst -- Great place for soft weapons. If you've seen Jeramis' swords, this is where he got them.
Bujinkan Irvine -- Irvine, CA. Chuck Cory Shihan's dojo. Great dojo & cool people! Be sure to check their seminar page every so often as they host excellent seminars. Well worth the travel time to get there.
Bujinkan Los Angeles -- Content on the nine schools. Links to stores. Excellent dojo. Many senior level instructors and practicianers. Highly recommended.
Kihon.Com -- Bookstore, articles, glossary of Japanese terms. Cool site. Lots of good information. Soke's book, Ninpo: Wisdom for Life, is available here. There are also lesson videos available for about a $50 a year membership fee. The two or three samples I've seen on YouTube are basic but well done.
Hanako: Lincolnshire, England. Excellent section on history of the Bujinkan schools. News letter, store, and generally a good place to spend some time reading.