Public domain images, royalty free stock photos, copyright friendly free images. Not copyrighted, no rights reserved. All pictures on this site are explicitly placed in the public domain, free for any personal or commercial use.
With the launch of NGA Images, the National Gallery of Art implements an open access policy for digital images of works of art that the Gallery believes to be in the public domain. Images of these works are now available free of charge for any use, commercial or non-commercial. Users do not need to contact the Gallery for authorization to use these images. They are available for download at the NGA Images website
Pixabay is a vibrant community of creatives, sharing royalty free images, videos and music. All content is released under the Pixabay License, which makes them safe to use without asking for permission or giving credit to the artist - even for commercial purposes.
Pexels is a library of 40,000 free high-quality stock photos, which can be used for both personal and commercial purposes. All photos are covered under the Creative Commons Zero license, and attribution is not required. Users can search for images or can also browse by color, popular photos, popular searches, photographers, and categories (summer, abstract, city, fashion, etc.)