Books

Aquapress   UK-based bookstore that specializes in diving, shipwrecks & all underwater matters
Gary Gentile Productions Ltd.   Official site of the legendary US wreck diver, for books and more
Hammerhead Press   Sport diving and various diving books
Ship-Wrecks   Guide to Norfolk wrecks

Miscellaneous

DAN Europe   Divers Alert Network
UK diving   Internet resource for divers
Diversworld.com   A site that aims collectively to bring world diving together
Tec Deep Blue   Technical diving in Malta
Xanadudive.com   Xanadu Undersea Adventures
Goforadive.com   Scuba Diving links

Magazines

Wreck Diving Magazine   The "National Geographic" of wreck diving
Advanced Diver Magazine   US-based technical diving magazine
Beyond the Blue   The UK based magazine specializing in advanced diving techniques
Diver   UK's High St best selling diving magazine
Subsea   Ireland's national diving magazine
Subsea   Ireland's national diving magazine

Rebreathers

Ambient Pressure Diving   Manufacturers of Inspiration rebreathers
Diver Dave's Rebreather Site  Tear down of rigs by Dave Sutton
KISS Manufacturing   Manufactuers of KISS closed-circuit rebreathers

Technical diving

Deep Image   Leigh Bishop's top deep wreck diving website

Wreck diving

Christina Young   Wreck diving in the northeastern US
DEEP SEA   Deep Shipwreck Explorer's Association
North Valley Divers   Information for diving Truk Lagoon
Deep Explorers   Dan Crowell's US East-coast based dive company for commercial charters and film
AUE   The Association of Underwater Explorers
DiveXsite   Recreational and technical scuba from Brisbane, Australia

Decompression Diving Software

Abyss   Decompression software
Decoweenie Technical Diving   Decompression software
GAP-software   Decompression and table generation software
VR3   Dive Planning Software and VR3 OC & CCR mixed gas decompression computer