Excelente listado de sitios que recopilan fotos para descargar gratis o "royalty free".

Inexpensive (but good)

1. iStockphoto.com One dollar for low-rez images and two-three dollars for higher-rez images. This is my favorite site.
2. Dreams Time About one dollar for high-rez images for members.
3. Shutterstock 750 royalty-free downloads per month for $139 (US) subscription.
4. Fotolia One or two bucks an image.

Free (but not bad)

1. Morgue File Providing "…free image reference material for use in all creative pursuits.
2. Flickr’s Creative Commons pool Search the myriad photos people are sharing on flickr by the type of CC license.
3. Image*After From their site: "Image*After is a large online free photo collection. You can download and use any image or texture…and use it in your own work, either personal or commercial."
4. Stock.xchng Close to 200,000 photos. Some gems in there if you look.

Ver listado completo en: http://www.presentationzen.com/