UIS Informatics Commission
Formed in 1986 to encourage and facilitate the systematic collection and use of karst and related data on an international basis. Includes calendar of events, project and contact information.

International Union of Speleology
Formed in 1965 and has departments devoted to protection and management, research, documentation, exploration and education. Includes bulletins and contact information.

Hong Meigui Cave Exploration Society
Offers expeditions in China and other countries. Includes articles and stories, trip calendar, photos, survey data, and contact information.

Jamaican Caves and Sinkholes
Crew is dedicated to exploration, surveying and preservation. Includes trip reports, field notes, databases, photos and contacts.

Cave Research Association (MAD)
Located in Ankara, Turkey and a member of the Union of International Speleology. Promotes exploration and conservation. Includes meeting and contact information. [Turkish and English].

International Society for Speleological Art
ISSA's aim is to promote the artistic interpretation of caves and karst landscape. Membership, galleries, contact, activity and background information.