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/