Harry Patton Horseshoeing Supplies: http://www.harrypatton.com/ Two stores that supply a complete line of farrier supplies
Internet Archive: http://www.archive.org Excellent resource to locate and reprint out of date and not in copyright books, articles, video's, etc such as "The Exterior of the Horse (1904)" by Armand Goubaux, barrier Gustave, and Simon Harger.
Life Data Labs, Inc: http://www.lifedatalabs.com/ Right Step, Farriers Formula (the best hoof supplement), Farrier's Hoof Prep, and other products for your horse
Noavel Headstall: http://www.noavel.net/ Rick Wheat, has the most unique training techniques that he patented along with the best kept secret in horse training
Rocky Mountain Research and Consulting, Inc: http://www.safergrass.org/ Katy Watts educates you on all you need to know about dietary management of the carbohydrate intolerant horse, forage and pasture management
Spalding Labatories: http://www.spalding-labs.com Pesticide free fly control. Many customers really speak very positive of these Fly Predators.
Tom's Western Store: http://www.tomswesternstore.com A fantastic equine store in Ovid, Michigan that has nearly everything from English to Western, Hats to Boots
World Wide Farriers Directory: http://www.farriers.com Find a farrier in your area