I discovered a great "stock" photo site the other day. Unsplash is a royalty free stock photo site with no strings attached. Pick from a curated set of images. And it's not the cheesy, trite, stock images we're all used to seeing, they're good looking images. I won't use any on my personal site, but on off-shoot sites, sites for friends, or in presentations this then unsplash works great! Not very much inventory to choose from, but there's something there for a variety of uses.
Check them out.