Airheads Scuba, Inc.
   Training center for both recreational and technical diving. Sales and service of equipment as well as rebreathers.
   http://www.airheadsscuba.com/

Alp-Maritimes Sports
   Scuba courses and education from beginner to expert, cave diving gas mixing, liveaboard trips and certification
   http://technicaldivingops.com

Cave Diving Instruction and Guiding
   DIR-Mexico is dedicated to quality cave diving instruction and guiding in Mexico's Yucatan Peninsula.
   http://www.dir-mexico.com

Cavediving.org
   Technical, nitrox, cave diving and other courses offered by this organization based in Lake City, Florida.
   http://cavediving.org/

Cenote Diving and Training Facility
   Cavern and cave diving in Tulum, Mexico.
   http://www.cenotedive.com

DE-OX TEMC
   Digital instruments for technical diving, nitrox trimix diving and rebreather diving.
   http://www.temc.it/

Dive TEK Adventures
   Technical diving adventures and training, in Hawaii. Courses include: Nitrox, Decompression and Extended Range Diving, Trimix, Rebreathers, DPV, Gas Blender, and Service Technician.
   http://www.divetekadventures.com/

Dive-Tech: Nitrox and Technical Diver Training
   Provides course descriptions, links and contacts. Located in Sury, UK.
   http://www.dive-tech.co.uk

Diver Services
   A site dedicated to the advancement of technical divers.
   http://www.diverservices.com

Florida Technical Wreck Diving Journal
   Detailed narrative on all the best technical trimix SCUBA dive sites in Florida.
   http://www.mikey.net/scuba/

GAS Diving UK
   UK based technical diving instruction and access to hard to find dive equipment. Online Equipment configuration details
   http://www.gasdiving.co.uk

Galicia Technical Diving
   Technical diving education, training and services.
   http://www.galiciatechnicaldiving.be/

Mandarin Divers
   Providing recreational and technical dive courses, including cave, rebreather, deep dive, wreck hunting and expeditions, and dive products.
   http://www.mandarin-divers.com/

Mantis Diving - Brisbane, Queensland, Australia
   Scuba Diving and Technical Diving Courses. Gear Sales, Hire and Service. South East Queenslands Deep Wreck diving specialists. A full range of technical courses for three different certification agencies.
   http://www.mantisdive.com.au

Mediterranean Sea Technical Divers
   Wreck and cave diving Italian web site. Merlo's well exploration web site.
   http://web.infinito.it/utenti/s/simonant/index.htm

On the air....
   Information about the physics of technical diving, including the influences of inert gases on decompression and diver insulation. Decompression calculations using the Varying Permeability Model (VPM) bubble model.
   http://www.decompression.org/maiken/home.htm

OxyCheq
   Sells oxygen sensors for all types of rebreathers and O2 analyzers. They also sell an oxygen analyzer kit that includes the sensor.
   http://oxycheq.com

TechDiving.org
   Diving classes ranging from open water to nitrox and other technical courses. Austin, Texas.
   http://www.techdiving.org/

The Dive Bell
   Commercial diver training academy in Townsville, North Queensland, Australia, offering training leading to HSE and Norwegian Petroleum Directorate recognition, nitrox and technical diving, diver medical technician training, and recreational dive courses,
   http://www.divebell.com/

Trimix
   Information on trimix and other mixed gas diving.
   http://www.cisatlantic.com/trimix/

VoodooGas
   Home of the VoodooGas Team.
   http://www.voodoogas.com