Unsplash - Unsplash is a website with high-quality free HD images. It has a catalog of more than three hundred thousand striking images that are neatly organized with tags. Read more about Unsplash.
Img.vision - Image hosting & video hosting for eCommerce sellers
Reshot - Tons of uniquely free stock photos. Handpicked & non-stocky
UploadHouse - Thumbnail and resize your photos and images
Snapixen - Snapixen is a website where you can upload any image you want.
ImageVenue - ImageVenue is a great online hosting service that allows uploading pictures for showing creative works with a simple-to-use technique.