Breed Information:

American Kennel Club

The Labrador Club of America - the AKC parent club of the Labrador Retriever
The Golden Retriever Club of America - the AKC parent club of the Golden Retriever

Professional Organizations:

Professional Retriever Trainers Association

Online Entry and Results:

EntryExpress - Enter field trials and hunt tests online.

Online Resources:

RetrieverTraining.net - Forum for training and event information, also classified ads.
Working Retriever Central - Home of Field Trial News. Information on field events and retriever breeds.
Good Dog Info - Pedigree information for Labrador Retrievers
K9data - Pedigree information for Golden Retrievers
Tritronics
Pro Plan Dog Foods
Dog Boxes

Health and Wellness:

Othropedic Foundation for Animals - OFA is the leading database for hip and elbow screening in canines.
Canine Eye Registration Foundation - Registry of canines certified free of heritable eye disease.
Microchip
Breeding