Big Stock
This is a great website to sell your photographs or to purchase and download photos to use.
If you are a designer,you can search for and download high resolution stock images for free, while also having the option to purchase RF licensed images.

If you are a photographer,Dreamstime offers you the opportunity to achieve great portfolio exposure by offering free images.

Royalty Free Images
Fan Art Review
This is a great site to showcase your photographs. You can earn points for reviewing other photographer's and artists works. You can also sell your work on this website commission free.
Picture Stock
Sell your photography at this site.