Back in the Saddle Horse Adoption - Accepts donations of unwanted riding horses and ponies in the United States and matches them to adopters. Adoption and donation forms online. Based in Florida. - http://bitshorseadopt.org/
Wild Horse and Burro Program - Information on the Adopt-a-Horse-or-Burro program and how to qualify for adoption. This program is run by the Bureau of Land Management. - http://www.wildhorseandburro.blm.gov/
Standardbred Retirement Foundation - Non-profit horse adoption organization created to care for and locate new homes and opportunities for Standardbred horses. Sponsorships and youth program information available plus a listing of adoptable horses. - http://www.adoptahorse.org
American Standardbred Adoption Program - Gives temporary homes to harness racing horses after they've retired from racing. Serves Wisconsin, Illinois, Iowa, Minnesota, and Michigan. Contains discussion forum, adoption details, and profiles of available horses. - http://www.4thehorses.com/