This beautiful silhouette of a black stallion galloping though the stars is available as a scalable vector graphic and large transparent png.
A blacksmith fitting a beautiful brown horse with metal horseshoes.
Another silhouette, this one of a polo player on horseback during the game.
A jockey racing his powerful racehorse to the finish line.
Here's a very cute cartoon of a friendly looking donkey or mule.
A classic children's toy, a wooden rocking horse.
Here's a shiny silver horseshoe, not just used for shoeing horse, these are also though to bring luck if hung with the ends facing up like in this graphic!
A man wearing a decorative military uniform riding a brown horse.
A little brown foal taking his or her first steps, so cute!
This small piece of vintage clipart shows a general on horseback tipping his tricorn hat.
Cartoon of a brown horse or pony, prancing and lifting his (or her) front feet off the ground.
A small image of a brown stallion trotting.
Victorian clipart of a couple in a carriage pulled very quickly by 2 horses.
Another Victorian graphic, this one of a horse trainer.
This still image of white horse frozen with his mane and tail flowing expresses so much power!
Silhouette of an animated horse drawn buggy.