Hat tip to Meggan for alerting me to this site:
Searching for the right horse or trying to find the perfect home for one? Look no further! All Heart Inc., a Barrington, Illinois company is launching a extraordinary new concept – DonateMyHorse.com – the perfect website for prospective adopters to view photos and information on horses needing good homes.
DonateMyHorse.com offers listings from across the nation with advanced search options that facilitate the match of donor and adopter. All text ads are free and packages are available for different viewing options.
All Heart Inc. wants to make the adoption of horses needing good homes both easy and successful for donors and adopters alike. DonateMyHorse.com is the first and only website specifically designed for such a purpose.
Too bad the ads aren’t free.
Bridlepath 
If it helps get the horses a good home, I guess that’s all that matters.