Useful links 4 u - 13 Best photo sites for CC0 and Public Domain Licensed Images

High quality CC-licensed images are easy. The majority of the collections include images that fall under the Creative Commons Attribution-Sharealike 2.0 license. While these images are fine for blogging, they cannot be distributed with GPL-licensed software.

CC0 is a public domain dedication from Creative Commons. A work released under CC0 is dedicated to the public domain to the fullest extent permitted by law. If that is not possible for any reason, CC0 also provides a lax, permissive license as a fallback. Both public domain works and the lax license provided by CC0 are compatible with the GNU GPL.

If you are distributing a GPL-licensed product with images, such as a WordPress theme or plugin, your best bet is to opt for using images with the CC0 or Public Domain license.

Top Sources for CC0 and Public Domain Licensed Images:

1)     Unsplash

2)     PublicDomainPictures

3)     Pixabay     

4)     SplitShire

5)     1 Million Free Pictures

6)     Viintage

7)     Gratisography 

8)     Little Visuals

9)     PDpics

10)   The British Library

11)   New Old Stock

12)   Pickup Image

13)   Public Domain Archive