The Creative Commons licenses have been a blessing a curse. It’s allowed people to freely publish their images for other people to use while still having some degree of control over how it’s used. It’s also allowed many people to get access to imagery that they might not otherwise be able to afford to use. But it has also led to a few problems.
There are a number of image search websites out there for Creative Commons content now, including Google Images, but now Creative Commons have combined them all into a single searchable database.