Australasia and Asia

Australian Speleological Federation
Australasian Cave & Karst Management Association
Newcastle & Hunter Valley Speleological Society inc.
Speleological Research Group of Western Australian (SRGWA)
Waitomo Caves - New Zealand
Mole Creek Caving Club - Tasmania
Southern Tasmanian Caverneers - Tasmania
Sydney Speleological Society
Victorian Speleological Association
Under by Tom Aberdeen
CaveWorks - Commercial Caves in Western Australia
Hills Speleos
Jenolan Caves - NSW
Sydney Uni Speleological Society(SUSS)
Cave Diving down under

Speleological Exploration Club

Craven Pothole Club
Grampian Speleological Group
Gruppo Speleologico Piemontese
SKTJ Cave Page 
Sheffield University Speleological Society
Speleo page of the Moscow State University
Caves and Caving in the UK
Caves, Cavers and Caving in Sweden
Speleo INRIA Sophia
British Caving Association
UK Caving
British Cave Research Association
Speleological Union of Ireland
Dublin City University Caving Club
Southampton University Caving Club
Caves and Caving in the UK
Chelsea Spelaeological Society
Icelandic Speleological Society
Start Caving - Beginner guide to caving

International Union of Speleology
UIS Informatics Commission 
World Cave Database
Longest and Deepest Caves lists - Complied by Bob Gulden
The Virtual Cave - Fantastic Photos of ALL cave formations

Tourist Caves
The Great Cave at Niah, Sarawak Malasia A description and some photo's

United States and Mexico
Lechuguilla Photomap  
MET Grotto
Texas Speleological Association
Florida Cave diving 
Underwater Caves of the Yucatan
Boston Grotto
Upper Cumberland Grotto
The National Speleological Society
Cave Conservation and Management Section NSS

South America
Brazil - Exploration South of São Paulo
TerraSub - Brazilian Blog site (translated with Google Translate)

The Alberta Speleological Society (ASS) / Canada

Cave Research Sites
Bat Conservation International 
Cave Biology
Hoffman Environmental research Institute - cave research

Cave Surveying Software and Sites
Overview of Cave Surveying software by Wookey
Winkarst - a windows based survey package
Compass by Larry Fish
Survey and Cartography Section of the NSS
Therion digital cave maps

Equipment Suppliers
Mountain Designs
Karst Sports

Suggest or Correct Site