You are a looking for some free commercial use images, this video is the right resources for you. Links can be also found below. If you have any other suggestions, please let me know in the comments below. My fav goes to Unsplash.
Public Domain Archive
http://publicdomainarchive.com/Stock Snap
https://stocksnap.io/Pexels
https://www.pexels.com/Unsplash
https://unsplash.com/Bucketlistly
http://photos.bucketlistly.com/Splashbase
http://www.splashbase.co/Pixabay https://pixabay.com/
Death to the stock photo
http://deathtothestockphoto.com/Skuawk
http://skuawk.com/Find a photo
http://finda.photo/GRATISOGRAPHYMADE
http://gratisography.com/Stokpic
http://stokpic.com/Mystock
http://mystock.photos/Free nature stock
http://freenaturestock.com/Foodshot
http://foodshot.co/Magdeleine
https://magdeleine.co/Pickup image
http://pickupimage.com/Life of pix
http://www.lifeofpix.com/Split shire
https://www.splitshire.com/