• World Chelonian Trust. Dedicated to Conservation and Care. Care sheets, research, articles and more. Hosts the Turtle and Tortoise Newsletter for Chelonian Conservationists and Biologists and the Tewksbury Institute of Herpetology, an annotated list of chelonian species.
• The Reptile Database. An updated list of reptile species and articles.
• EMYSystem. An information repository supporting global turtle research. Interactive maps, articles, and activities.
• Chelonian Research Foundation. Supporting world-wide chelonian research. Founded by Dr. Peter Pritchard.
• Chelonian Research Institution. Also supporting world-wide chelonian research. 
• Turtle Conservancy and the Behler Chelonian Center. Conservation and advocacy.

General chelonian care

• Austin’s Turtle Page. Great general site with articles, state-by-state lists of laws and vets, care sheets, and the Turtle Forum. 
• California Turtle and Tortoise Club.
  (CTTC) One of the larger and older chelonian clubs in the US. Several
  good articles, although some are dated. Specializes in Desert Tortoises.
• Tortoise Trust. A UK-based site with great articles and research. Hosts the Tortoise Trust Institute– on-line classes for tortoise keepers.
• Empire of the Turtle. Great site for sales and information.
• Tortoise Supply. Mostly a sales site, but some very good information as well.
• Anapsid. Melissa Kaplan’s well-respected reptile care and information site.
• Tortoise Network. Kristina’s site with a mild focus on the Euro-African species.
• Tortoise Group.
  Specializing in Desert Tortoises, the info is helpful for everyone.
  They offer a booklet on cares that has a great section out outdoor pens.
• PetSmart has an OK ‘starter’ guide to general turtle and tortoise care.
• V. A. Haecky’s Turtle Information Pages (Turtlecare) lots of great care info, mostly for turtles but quite a bit for boxies and tortoises.
• D. Kirkpatrick’s Articles. Several great articles on reptiles and chelonians.
• Testudines.org A Spanish site (with English option) advertising itself as for turtles, tortoises, and people.

General dietary information 

– Edible tortoise plants

• Redfoottortoise.Com
• T-Lady’s List
• Russian Tortoise.Org
• Calif. Turtle and Tortoise Club (Tortoise.org)
• AfricanTortoise.Org
• Empire of the Turtle
• Tortoise Table UK

– Dangerous plants for animals

• Redfoottortoise.Com
• Russian Tortoise.Org
• Calif. Turtle and Tortoise Club (Tortoise.org)
• AfricanTortoise.Org
• Empire of the Turtle

Housing and environment

– Tortoise tables

• Russian Tortoise.Org (Vickie Hale)
• Tortoise Trust
• Reptile Channel
• Tortoise Yard

– Outdoor pens

• Tortoise Trust
• Turtle Stuff
• Reptile Channel
• LLLReptiles
• Tortoise Group

– Light, Heat, Humidity

• UV Guide UK
• Reptile UV Info
• Reptile UV Links
• Russian Tortoise.Org
• Small-scale Humidifier Plans

• Redfoot Tortoise. Joe Heineman’s care and sales site. Besides tortoises and good articles, he also offers useful supplies at Carolina Pet Supply.
• The Tortoise Yard. Vickie Hale’s red-footed and other tortoise page. Excellent articles.
• PetSmart Red-footed Care brochure. It is not a link, but the newer, full-color brochure is free and well-done.
• Santa Rita. A South American form raising tortoises commercially.
• Santa Cruz. Like Santa Rita

– Other forest tortoises

• Manouria– not a great site, but there are not a lot of choices
• See also Tortoise Trust, Chelonia, and California Turtle and Tortoise Club to the left.

– African spurred (Sulcata) and leopard