Not sure if this is what you had in mind, but a company called Abelssoft has a free program called CCFinder. It finds pictures published under the Creative Commons License. You can search for pictures that you can re-publicize or share without breaking the law or having to pay money. But since this program only searches for photos not protected by copyright or other legal means, it's not all inclusive. Abelssoft - CCFinder Plus 2014
Or, if you use a browser like Google, you could tailor your search for images only. If I completely misunderstood your question please accept my apologies.