Ashton Biodiversity Research and Preservation Institute and Gopher Tortoise Conservation Initiative.
- Includes information about gopher tortoises, their conservation and management, and the work of this Florida organization.
- http://www.ashtonbiodiversity.org/

Testudo
- Information about conservation of two species of tortoise (Testudo graeca and Testudo hermanni) in Bulgaria. In Bulgarian and English.
- http://www.testudo.hit.bg/

Radiated Tortoise
- Geochelone radiata, by David T. Kirkpatrick.
- http://www.unc.edu/~dtkirkpa/stuff/radiated.html

Gopher Tortoise Organization
- Conservation and management of the Gopher Tortoises (Gopherus polyphemus) and their habitat.
- http://www.gophertortoise.org/

Desert Tortoise Preserve Committee
- Group helps establish tortoise preserves, implements management programs for reserves and educational programs that evaluate measures aimed at ecosystem and critical habitat recovery.
- http://www.tortoise-tracks.org/

Desert Tortoise Council
- An international nonprofit organization whose members share a common fascination with wild desert tortoises and the environment they depend upon.
- http://www.deserttortoise.org/