Little Visualshttp://littlevisuals.co/
Unsplashhttp://unsplash.com/
Death to the Stock Photohttp://join.deathtothestockphoto.com/
New Old Stockhttp://nos.twnsnd.co/
Superfamous (requires attribution)http://superfamous.com/
Picjumbohttp://picjumbo.com/
The Pattern Libraryhttp://thepatternlibrary.com/
Gratisographyhttp://www.gratisography.com/
Getrefehttp://getrefe.tumblr.com/
IM Free (requires attribution)http://imcreator.com/free
Jay Mantrihttp://jaymantri.com/
Women of color in techhttps://www.flickr.com/photos/wocintechchat/
Public Domain Archivehttp://publicdomainarchive.com/
Magdeleinehttp://magdeleine.co/
Foodiesfeedhttp://foodiesfeed.com
Picographyhttp://picography.co/
Raumrothttp://www.raumrot.com/10/
ISO Republichttp://isorepublic.com/
Splitshirehttp://splitshire.com/
Pixabayhttp://pixabay.com/
500pxhttps://500px.com
文／简叔（作者）
原文链接：http://www.jianshu.com/p/5b7b09b93875