collection of useful(?) links
http://pixabay.com/
https://stocksnap.io/
http://www.free-images.cc/
https://unsplash.com/
https://www.pexels.com/
http://librestock.com/
http://skuawk.com/
http://www.sitebuilderreport.com/stock-up
http://finda.photo/
http://foodshot.co/
http://growthtext.com/free-stock-photos/
https://www.stockified.com/
https://www.negativespace.co/
https://everypixel.com/
http://startupstockphotos.com/
https://foodiesfeed.com/
https://picjumbo.com/
https://www.stockio.com/
http://cssicon.space/
https://fontawesome.com/
https://thenounproject.com/
http://ionicons.com/
https://zurb.com/playground/foundation-icon-fonts-3
http://s-ings.com/typicons/
http://fontello.com/
https://useiconic.com/
https://material.io/icons/
https://fonts.google.com/