- http://www.gratisography.com
- https://picjumbo.com
- http://www.lifeofpix.com
- https://pixabay.com/en/editors_choice/5
- http://raumrot.com
- http://jaymantri.com
- http://publicdomainarchive.com
- http://images.superfamous.com - CC 3.0 License
- http://nos.twnsnd.co
- http://picography.co
- http://magdeleine.co/browse/2
- https://unsplash.com
原文出处： http://icodesign.me/post/Free-Design-Photo-Resource-Library