What's the best site to download stock photos for free -quick answer needed

Deposit Photos has a free trial program. If you don't need a whole lot of photos, you can get their free trial and get the photos you need. I've done it before, and they have a large selection of great photos. Or, you can do an internet search for free stock photos. I've used morguefile.com before and they are completely free, although they don't have a really huge selection in some areas.

I guess I'm a bit late but I would have said go to creative commons search. You can search multiple sites such as photos that people have uploaded to flikr etc and released it in the public domain or any of the other combination of licence tags used by CC provided you follow them.