Turtle and Tortoise Club
A non-profit organization "dedicated to turtle & tortoise preservation,
conservation, study, and education since 1964." A very good
place to begin if you are looking for general turtle information.
Supplemented by many links to care sheets, breeding information,
Turtle & Tortoise Society
A non-profit organization that is "dedicated to the conservation,
preservation of habitat, and the promotion of proper husbandry and
captive propagation of turtles and tortoises." The site has
a listing of herp veterinarians throughout the US as well as good
information about the Asian Turtle Crisis.