This page is a list of horse and pony breeds, and also includes terms for types of horse that are not breeds but are commonly mistaken for breeds. While there is no scientifically accepted definition of the term "breed", a breed is defined generally as having distinct true-breeding characteristics over a number of generations. Its members may be called "purebred". In most cases, bloodlines of horse breeds are recorded with a breed registry. The concept is somewhat flexible in horses, as open stud books are created for developing horse breeds that are not yet fully true-breeding.
This site contains all about Horse Breeds With Pictures And Names.