So please dont be offended if your site is not listed here. If you think your site is worth a link just drop me a line at webmaster@chikarakarate.org.uk and I'll add you to the list.

General sites
Okinawa Prefecture. Basically a site advertising Okinawa, but they have put together a hell of allot of info about traditional Okinawan styles of Karate and kobudo. Some excellent video clips!!
Budoseek. Martial arts internet portal. You can find your way to any where from here!
USA National Karate-do Federation. Site with kata video clips and technical tips.
English Karate Governing Body.
gojuryu.net A portal with most things relating to Goju Ryu Karate on it.
About Martial Arts. Comprehensive portal.
Bushido online. More general stuff.
Karate Masters. Interesting site with biographies of most of the historical (and some not that historical) masters of karate. Also has bits on the origin of the major styles...Interesting!
National Karate and Kobudo Federation. An American site with some interesting stuff on the history of various katas.
World Karate Federation. Download a current copy of Karate competition rules from here.
Karate webzine
 

General Shotokan sites
Karate the Japanese way. Another comprehensive shotokan site. Nicely presented!
Shotokai.com A huge site with alot of information about the close relative of modern Shotokan.
Shotokan Links. An Australian site with more shotokan links than you can shake a stick at!
Shotokan kata.com A pay site with diagrams/explanations of all the Shotokan kata. Havn't paid, so can't say what it is like.
Shotokan Kata. A good site for bunkai explanations, also has alot of kata downloads

Organizations / Clubs (by style)
All style
British Karate Association.
International Society of Okinawan and Japanese Karate
Amateur Martial Arts Assoc.

Shotokan
British Shotokan Kyogi. Headed by Sensei Charles Gidley 7th Dan. In most of the comps we enter, usually ends up Chikara vs BSK. A good crowd
Japan Karate Shotorenmei GB&I. Another former JKA group(Asai faction). Has videos of newer none standard Shotokan katas...interesting
Ryu Do Shotokan. Members of the BKA and just up the road in Lancashire.
Karate Union of Great Britain.
International Shotokan Karate Federation
Shotokan Karate of America
Cincinnati Shotokan &Louisville Shotokan Old friends of mine. If you are in the area seek these guys out. They are two of the best instructors I have come across.
Southern Shotokan Karate Association.
SKIF. Main site for the international organisation
SKIF (Scotland)
SKIGB
SKI Belgium Federation. Alot of good photos + links to SKIF national federations.
Manchester University SKC. Download the JKA kata films from the 60's.
Chikara Karate Kai- West Midlands
FBSKUI.
Watford SKIF
Shotokan Kanazawa Ryu Karate International Federation
Karate Union of Australia.
International JKA. Organisation headed by Sensei Kato in Europe. Asai faction of the old JKA
Kissaki Karate. Shotokan based orginisation with Vince Morris as one of its senior instructors
Shotokan Karate Association. Headed by Sensei Akita, 5th Dan. Based around London
Shotokan Karate England. A London based group that split off the KUGB
 

Goju Ryu
Okinawan Traditional Goju Ryu Karate-do Assoc. Split off from English Goju Ryu a couple of years ago
English Goju-Ryu Karate-Do Association. Some basic info on Goju-Ryu
Okinawan Goyu Ryu Goyu-Kan. an American Goju site. Fair bit of info, particularly on Kata.
Sodokan Goju Karate Association. Comprehensive listing of UK Goju Ryu clubs of all flavours!!

Shito ryu
Shito Ryu . Traditional Shito Ryu portal. Fair bit of historical info.

Shorin Ryu
Tsunami dojo. Serbian Shorin Ryu dojo with a fair bit of info on both karate and kobudo.
North American Shorin Ryu Karate Do Assoc. Videos of both empty hand and Kobudo drills.
Shorin Ryu Shorinkan Karate-Kobudo

Chito Ryu
US Chito Ryu. Headed by William Dometrich 8th Dan. Met him a few years ago. Seemed like a nice bloke.

Uechi Ryu
South Liverpool Uechi Ryu
Uechi Ryu Karate Do Association of Great Britain
Uechi Ryu.com . American site with a large amount of info, including kata videos

Ryuei Ryu
Okinawa Ryuei Ryu Karate Kobudo Kai. Old "family" style headed by Tsuguo Sakumoto

Other Martial Arts
Kobudo
Ryukyu Kobudo Hozon Shinko Kai  Alot of general kobudo information.
USA Branch of RKHSK
International Okinawa Kobudo Association
Ryukyu Kobujutsu association GB. Group headed by Julian Mead 6th Dan. General info.

Kendo
British Kendo Association. Alot of info on Kendo, Iaido and Jodo
Yusinkan. A Danish kendo and Iaido club. Has photos diagrams of the basic Iai katas

Ninjutsu
Winjutsu.com.    A large site stuffed with info on Bujinkan Ninjutsu
Wirral Bujinkan. Ninjas on the Wirral!!!
Ninjutsu.com Big American Bujinkan site...Learn Ninjutsu and get your black belt from videos....No comment!!!
Ninjutsu.uk.com. British ninjutsu site
Genbukan Ninjutsu. Another ninjutsu Ryu, not as widely known.

Miscellaneous sites
Companies
  Weapons and Clothing Suppliers
Japanese Calligraphy by Master Eri Takase. Custom Certificate designs and a great place to translate names into Japanese calligraphy
Shotokan Karate Magazine
Battle Orders. Suppliers of weaponry, swords etc.
Playwell Martial Arts. Our main supplier and sponsor of the club squad.
Reimondo Weapons. British hand-made kobudo weaponry
Ichiban International. Suppliers of Tokido and Hirota Gi and belts
Suppliers of Shureido equipment and weapons.
Blitz Sports. Martial Arts suppliers