Stock photos
http://google.com/images (use searchfilter + creative commons license)
http://pixabay.com/
http://www.pexels.com/
https://www.flickr.com/creativecommons/
http://wallhaven.cc/
http://www.sitebuilderreport.com/stock-up
http://finda.photo/
http://labs.tineye.com/multicolr/
https://stocksnap.io/
Artistic photos
https://unsplash.com/
http://www.gratisography.com/
http://littlevisuals.co/
http://www.lifeofpix.com/
http://superfamous.com/
http://picjumbo.com/
http://nos.twnsnd.co/
http://getrefe.tumblr.com/
http://picography.co/
http://foodiesfeed.com/
http://magdeleine.co/browse/
http://jaymantri.com/
http://isorepublic.com/
http://travelcoffeebook.com/
http://publicdomainarchive.com/
http://www.raumrot.com/10/
http://jeshoots.com/
http://freenaturestock.com/
http://stokpic.com/
http://kaboompics.com/
http://www.resplashed.com/
http://www.splashbase.co/
http://mmt.li/
http://startupstockphotos.com/
http://moveast.me/
http://albumarium.com/
http://cupcake.nilssonlee.se/
https://photostockeditor.com/
http://www.freejpg.com.ar/
Stock videos
http://www.videoblocks.com/
http://mazwai.com/
https://www.storyandheart.com/
http://www.wedistill.io/
http://broll.io/
http://www.videvo.net/
http://www.lifeofvids.com/
http://www.clipcanvas.com/free-footage/
http://www.beachfrontbroll.com/