| Airheads Scuba, Inc. | | Training center for both recreational and technical diving. Sales and service of equipment as well as rebreathers. |
| Alp-Maritimes Sports | | Scuba courses and education from beginner to expert, cave diving gas mixing, liveaboard trips and certification |
| Cavediving.org | | Technical, nitrox, cave diving and other courses offered by this organization based in Lake City, Florida. |
| DE-OX TEMC | | Digital instruments for technical diving, nitrox trimix diving and rebreather diving. |
| 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. |
| Diver Services | | A site dedicated to the advancement of technical divers. |
| Florida Cave Diving | | Photos and current information on the cave and cavern systems and the springs of Florida. Separate listings for caverns and caves. |
| GAS Diving UK | | UK based technical diving instruction and access to hard to find dive equipment. Online Equipment configuration details |
| Mandarin Divers | | Providing recreational and technical dive courses, including cave, rebreather, deep dive, wreck hunting and expeditions, and dive products. |
| 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. |
| 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. |
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